Question

Jill swam 200 meters in 2 minutes and 42 seconds. If each lap is 50 meters long, which time is her estimated, time, in seconds, per lap?
A. 32
B. 60
C. 48
D. 40

Answer 1

Answer:

D. 40

Step-by-step explanation:

First, calculate the total time she took in seconds.

Convert minutes to seconds using 60 seconds = 1 minute

2 min X 60 s = 120 s

Total time = 120 s + 42 s = 162 s

Calculate the total number of laps.

Convert metres to laps using 50 metres = 1 lap

Laps = 200 m ÷ 50 m = 4 laps

Divide the total time by the number of laps to calculate the unit rate, which is time per one lap.

Since it says to estimate, round 162 seconds.

162 s ≈ 160 s

160 s ÷ 4 laps ≈ 40s/lap

Her estimated time per lap is 40s.