Question

A child, who is 45 m from the bank of a river is being carried downstream by the river's swift current of 1.0 m/s. As the child passes a lifeguard on the river's bank, the lifeguard starts swimming in a straight line until she reaches the child at a point downstream. If the lifeguard can swim 2.0 m/s relative to the water, how long does it take her to reach the child? How far downstream does the lifeguard intercept the child?

Answer 1

relative distance lifeguard has to swim:45 meters, swimming at 2m/s

time=45/2=22.5 seconds.

how far downstream: 1m/s*22.5s=22.5m

Answer 2

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Answer 3

Thanks!

Answer 4

thanks!

Answer 5

what rubbish