Question

if a boat running upstream takes 7 hours to cover a certain distance while it takes 4 hours to cover the same distance running downstream then the ratio between the speed of the boat to the speed of the motor current is​

Answer 1

Answer:

Let the man's rate upstream be x kmph and that downstream be y kmph.

Then, distance covered upstream in 8 hrs 48 min = Distance covered downstream in 4 hrs.

⇒x×845=y×4⇒445x=4y⇒y=115x∴Requiredratio=y+x2:y−x2=(16x5×12):(6x5×12)=85:35=8:3