Question

A race boat covers a distance of 66 km down stream in 110 min. It covers this distance upstream in 120 min. The speed of boat in still water is 34.5km/h.find the spead of the stream.

Answer 1

Answer:

v=1.5km/hr

Step-by-step explanation:

let the speed of the stream be v

110min=1.8333hr

as per the question

we have

66=(v+34.5)*1.8333

simplifying,

36=v+34.5

v=1.5km/hr

also,

66=(34.5-v)*2

33=34.5-v

v=1.5km/hr.

hence verified