Q: John decided to start rowing around a square lake. Each side of the lake is 15 miles. Jake can row at twice the speed he can swim. It takes him 20 minutes to swim 1 mile. How long, in hours, does it take to row the lake?
A: The perimeter of the lake is 4 * 15 = 60 miles. He swims at a speed of 60 / 20 = 3 mph. So he rows at a speed of 3 * 2 = 6 mph. That means it takes him 60 / 6 = 10 hours to row around the lake. The answer is 10.
Question: Penelope the pig eats 20 pounds of food per day, which is 10 times more than Greta the goose eats per day. Milton the mouse eats 1/100 as much as Greta the goose eats per day, but Elmer the elephant eats 4000 times more than Milton the mouse does per day. How much more, in pounds, does Elmer the elephant eat per day than Penelope the pig?
Answer: Greta the goose eats 20 / 10 = 2 pounds of food per day. Milton the mouse eats (1 / 100) * 2 = 1 / 50 of a pound of food per day. Elmer the elephant eats 4000 * (1 / 50) = 80 pounds of food per day. Thus, Elmer eats 80 - 20 = 60 pounds more food per day than does Penelope the pig. The answer is 60.
[Question]John has to get a new blanket. He decides to have a 7 foot by 8-foot quilt made. The quilt costs $40 per square foot. How much does his quilt cost?
[Answer]The quilt is 7 * 8 = 56 square feet. So it cost 40 * 56 = 2240. The answer is 2240.
Q: Rodney is a door-to-door salesman trying to sell home security systems. He gets a commission of $25 for each system he sells. He is canvassing a neighborhood of four streets with eight houses each. The first street gave him half the sales that the second street did, while every house on the third street turned him away and the fourth street resulted in only one sale. His total commission was $175. How many security systems did he sell on the second street?
A: Let S be the number of systems Rodney sold on the first street. He sold 2S systems on the second street. Based on his commission, he sold 175 / 25 = 7 systems. In all, he sold S + 2S + 0 + 1 = 3S + 1 = 7 systems. On the first and second streets, he sold 3S = 7 - 1 = 6 systems. Thus, on the first street he sold S = 6 / 3 = 2 systems. On the second street, Rodney sold 2 * 2 = 4 security systems. The answer is 4.
Question: Randy has $200 in his piggy bank. He spends 2 dollars every time he goes to the store. He makes 4 trips to the store every month. How much money, in dollars, will be in his piggy bank after a year?
Answer: Randy spends 2 * 4 = 8 dollars every month. Randy spends 8 * 12 = 96 dollars in a year. Randy will have 200 - 96 = 104 dollars in his piggy bank after a year. The answer is 104.
Q: Brady will make $450 more in a year than Dwayne. If Dwayne makes $1,500 in a year, how much will Brady and Dwayne make combined in a year?
A:
Brady will make $450 + $1500 = $1950. Combined, Brady and Dwayne will make $1950 + $1500 = $3450 in a year. The answer is 3450.