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

Total time to complete the race = 45 sec

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

Average speed for second lap = 2 m/sec

So time taken to cover the second lap

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

d

explanation:

i think the answer is d. but im not sure!

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .