Question

7. If a boat takes 4 hours to cover a distance of 8 km upstream
while the speed of the stream is 1.5 km/hr. What is the
speed of the boat in still water?
a) 4 km/h
b) 6.5 km/h
c) 3.5 km/h
d) 2.5 km/h​

Answer 1

Answer:

option c

Step-by-step explanation:

let speed of boat in still water be x kmph.

speed=distance/time

(x-1.5)= 8/4=2

or,x=2+1.5=3.5 km/h