Question

ring a race a swimmer completes two laps. The first lap is From point A to B; the second is from B to A. Each lap is 60 meters long. The average speed for the first lap is 2 m/s; for the second lap it is 4 m/s.(a) How long does it take the swimmer to complete the race

Answer 1

Total time to complete the race = 45 sec

Step-by-step explanation:

We have given that each lap is 60 m long

Average speed for the first lap = 2 m/sec

So time taken to complete the first lap
`time\ t=(distance)/(speed)=(60)/(2)=30sec`

Average speed for second lap = 2 m/sec

So time taken to cover the second lap
`time\ t=(distance)/(speed)=(60)/(4)=15sec`

So total time to complete the race = 30 +15 =45 sec