Question

A motorboat whose speed is 18 km/hr in still water takes 1 hr less more to go 24 km upstream than to return downstream to the same spot.Find the speed of the stream.

Answer 1

let the "x" km\hr
motor boat sped= 18 km\hr
distance travel speed=24 km
speed of boat upstream =18-x km/hr
time taken travel upstream =24\18-x

the distance travelled upstream=24 km
speed of the boat down stream=18+x km/hr

24/18-x = 1 +24/18+x
ans. 6 km/ hr

Answer 2

let the "x" km\hr
motor boat sped= 18 km\hr
distance travel speed=24 km
speed of boat upstream =18-x km/hr
time taken travel upstream =24\18-x

the distance travelled upstream=24 km
speed of the boat down stream=18+x km/hr
from dis we equate to get 6kmph