A skater crossed a frozen river 1 mile wide in 5 minutes with the wind behind him. It took him 15 minutes where skated into the wind. What was the speed of the wind?
1 Answer
Jan 17, 2017
4 MPH
Explanation:
If it took him five minutes to go across a river one mile long, that means that his speed with the wind is twelve MPH. If it took the skater fifteen minutes to go across the river that is one mile, that means that his speed against the wind is four MPH. Since twelve minus four is eight, and there is a speed against and with the wind, the number is divided by two and the answer is four MPH.
