Question

Elisa can swim 10 laps in 20 minutes. At this same rate, Elisa can swim laps in 32 minutes.

Answer 1

16 laps

Explanation:

10 laps in 20 minutes means that :

for 1 lap elisa swims for ( 20 /10 ) = 2 minutes

now you can cross multiply to get the answer for how many laps elisa can swim in 32 minutes

--- us the method of cross multiplication when there is one value that you need to find out .. if the rate of change is the same...

laps time

1 : 2

x : 32

32 * 1 = 2x

32 = 2x

x = 32/2

x = 16

hence elisa takes 32 minutes to swim 16 laps

Answer 2

16 laps

Explanation:

If Elisa can swim 10 laps in 20 minutes.

That’s 10 L = 20 mins

At this same rate Elisa can swim x laps in 32 mins

Therefore

10 laps = 20 mins

x laps = 32 mins

Cross multiply

20x = 10 x 32

20x = 320

Divide both sides by 20

20x/20 = 320/20

x = 16

Elisa can swim 16 laps in 32 minutes