Question

Marcie can swim 20 laps in an hour. How many hours will it take her to swim 100 laps

Answer 1

Answer:

5 hours

Step-by-step explanation:

It takes Marcie 1 hour to swim 20 laps so to swim 100 laps divide by 20. 100/20=5

Answer 2

Answer:

5 hours

Step-by-step explanation:

We can write a ratio

20 laps           100 laps

-------------- = --------------

1 hour            x hours

Using cross products

20x = 100

Divide by 20

20x/20 = 100/20

x = 5 hours