A boat traveling upstream goes 84 kilometers in 7 hours. If the return trip takes only 3 hours, what is the speed (in kilometers

Question

Liono4ka [1.6K]

3 years ago

8

A boat traveling upstream goes 84 kilometers in 7 hours. If the return trip takes only 3 hours, what is the speed (in kilometers

per hour) of the boat still in water?

Mathematics

1 answer:

Hunter-Best [27] · Answer 1 · 2022-05-16T04:33:46+03:00

Hunter-Best [27]3 years ago

8 0

Speed = Distance ÷ time

Speed upstream = 84 ÷ 7 = 12 km/h

Speed downstream = 84 ÷ 3 = 28 km/h

Speed in still water = 1/2(28 + 12) = 20 km/h

Answer: 20 km/h