In a rice field, you can get a total of 20 sacks of rice every harvest. If the yield increases by twenty percent after every harvest, what is the total number of sacks of rice you can get after the first and second harvest?

How many sacks of rice were there after the first harvest? ** There were 20 x 0.20 =

<<20*0.20=4>>4 sacks of rice increase after the first harvest. How many sacks of rice can you get after the first and second harvest? ** So the total sack of rice that you can get on the next harvest 20 + 4 = <<20+4=24>>24. What is the total number of sacks of rice you can get after the first and second harvest? ** Therefore the total number of sacks of rice you will get on the first and second harvest is 20 + 24 = <<20+24=44>>44. #### 44 Stefan goes to a restaurant to eat dinner with his family. They order an appetizer that costs $10 and 4 entrees that are $20 each. If they tip 20% of the total for the waiter, what is the total amount of money that they spend at the restaurant? How much do the entrees cost? ** The total cost of the entrees is 4 * $20 = $<<4*20=80>>80. What is the total cost of the dinner? ** The total cost of the dinner is $80 + $10 = $<<80+10=90>>90. How much is the tip? ** The tip is $90 * 0.20 = $<<90*0.20=18>>18 What is the total cost with tip? ** The total cost with tip is $90 + $18 = $<<90+18=108>>108 #### 108 James replaces the coffee for the household. There are 3 other people in the house and everyone drinks 2 cups of coffee a day. It takes .5 ounces of coffee per cup of coffee. If coffee costs $1.25 an ounce, how much does he spend on coffee a week? How many people are in the house? ** There are 3+1=<<3+1=4>>4 people in the house How many cups of coffee do they drink a day? ** So they drink 4*2=<<4*2=8>>8 cups of coffee a day How many ounces of coffee do they use a day? ** That means they use 8*.5=<<8*.5=4>>4 ounces of coffee a day How many ounces of coffee do they use a week? ** So they use 4*7=<<4*7=28>>28 ounces of coffee a week How much does he spend on coffee a week? ** So he spends 28*1.25=$<<28*1.25=35>>35 #### 35 A man intends to complete a journey of 24 km in 8 hours. If he travels at a speed of 4km/hr for the first four hours, at what speed does he need to travel for the remainder of the journey to be right on time? How far does he travel in the first 4 hours? ** He covers 4km/hr*4hrs = <<4*4=16>>16km in the first 4 hours How far does he have left to travel? ** He has 24-16 = <<24-16=8>>8km left to cover How many hours does he have left to travel? ** He has 8-4 = <<8-4=4>>4 hours to cover the remaining 8km How fast does he need to travel for the remainder of the journey to be right on time? ** He has to travel at a speed of 8km/4hrs = 2km/hr to be right on time #### 2 Mark made a chalkboard that is 3 feet wide. It is 2 times as long as it is wide. What is the area of the chalkboard? How long is the chalkboard? ** The length of the chalkboard is 2 x the width of 3 feet = <<2*3=6>>6 feet. How many square feet is the chalkboard? ** We can calculate area by multiplying the width and the length, so 3 feet x 6 feet = <<3*6=18>>18 feet. #### 18 A candy store uses food colouring in various candies. Each lollipop uses 5ml of food colouring, and each hard candy also needs food colouring. In one day, the candy store makes 100 lollipops and 5 hard candies. They do not use food colouring in anything else. The store has used 600ml of food colouring by the end of the day. How much food colouring, in millilitres, does each hard candy need? How much food colouring did the lollipops need? ** In total, the lollipops needed 5ml of food colouring * 100 lollipops = <<5*100=500>>500ml of food colouring. How much food colouring did the hard candies need? ** This means that the hard candies needed 600ml total food colouring – 500ml food colouring for lollipops = 100ml of food colouring. How much food colouring does each hard candy need? ** So each hard candy needed 100ml of food colouring / 5 hard candies = <<100/5=20>>20 ml of food colouring. #### 20 Ned is an explosives specialist racing to deactivate a time bomb on the top floor of a building. The building has twenty flights of stairs to the top floor, and Ned can run up one flight of stairs in eleven seconds. The time bomb has 72 seconds left on the timer, and Ned has spent 165 seconds running up the stairs. How many seconds will Ned have to diffuse the bomb when he reaches it? How many flights of stairs has Ned gone up? ** Ned has gone up 165 / 11 = <<165/11=15>>15 flights of stairs. How many flights of stairs does Ned have left to run up? ** Thus, he has 20 - 15 = <<20-15=5>>5 flights of stairs left to run up. How many seconds will Ned spend running up the remaining stairs? ** He will spend 5 * 11 = <<5*11=55>>55 seconds running up the remaining stairs to the bomb. How many seconds will Ned have to defuse the bomb? ** Therefore, he will have 72 - 55 = <<72-55=17>>17 seconds to defuse the bomb. #### 17 During the outbreak of the coronavirus, a company had to ramp up its toilet paper production three times more to cover the increased demand. If the company was producing 7000 toilet paper per day, calculate its total toilet paper production during March of 2020 after increasing its production. How many more toilet papers did the company produce when it ramped up its production? ** If the company was producing 7000 toilet paper per day, when it ramped up its toilet paper production three times per day, it produced 3*7000 = 21000 more per day. How many more toilet papers did the company produce when it ramped up its production? ** The total toilet production by the company increased to 7000+21000 = <<7000+21000=28000>>28000 How many toilet papers did the company produce in March? ** In March, with 31 days, the company produced a total of 28000*31 = <<28000*31=868000>>868000 toilet papers #### 868000 Jack goes up three flights of stairs, then down six flights of stairs. If each flight of stairs has 12 steps that each each 8 inches high, how many feet further down is Jack than when he started? How many inches are in each flight of stairs? ** First find the number of inches in each flight of stairs: 12 steps * 8 inches/step = <<12*8=96>>96 inches How many flights of stairs did Jack go down? ** Then find the net number of flights of stairs Jack went down: 6 flights - 3 flights = <<6-3=3>>3 flights How many inches further down is Jack than when he started? ** Then multiply than number by the number of inches per flight to find how many inches further down he is: 96 inches/flight * 3 flights = <<96*3=288>>288 inches How many feet further down is Jack than when he started? ** Then divide that number by 12 to find the number of feet down he is: 288 inches / 12 inches/foot = <<288/12=24>>24 feet #### 24 A dog barks 30 times per minute. If 2 dogs bark 30 times per minute, how many times will they have barked after 10 minutes? How many times do the dogs bark together? ** There are 2 dogs and they each bark 30 times per minute so together they bark 2*30 = <<2*30=60>>60 times per minute How many times will the dogs have barked after 10 minutes? ** 2 dogs bark a combined total of 60 times per minutes, after 10 minutes they will have barked 60*10 = <<60*10=600>>600 times #### 600