Question

A dolphin swimming against an ocean current traveled Go miles in 2 hours. It then Hemed to swim with the current and was able to get back to it's starting place in 1.5 hours. find the speed of the dolphin in still water and the rate of the current.

Answer 1

Data:

Swimming against current:

Distance: d= 60miles

Time: t = 2h

swimming with the current:

Dictance: d= 60miles

Time; t = 1.5h

1. The speed against current:

`v_{}=(d)/(t)`
`v_(ac)=\frac{60\text{miles}}{2h}=30\frac{\text{miles}}{h}`

2. The speed with the current:

`v=(d)/(t)`
`v_(wc)=(60miles)/(1.5h)=40\frac{\text{miles}}{h}`