Pls solve this one asap

Dear student,
 

Distance covered downstream = Distance covered upstream = 15 km

Total time taken = 3 hours 45 minutes = (3+45/60) minutes = 225/60 minutes = 15/4 minutes

The value of x cannot be negative; therefore, the speed of the stream is 3 km/hr. 

Regards.

Dear student,

Surbhi Kumar (Meritnation expert) answered on 6/9/18


Regards.

Here-

Hope this helps:)

Average speed = total distance/ time taken
AS= 30KM/(15/4) = 120KM/15H 
7KM/H