A boat can travel with a speed of 19 km/h in still water. If the speed of the stream is 3 km/h, then what will be the total time (in hours) taken by the boat to go 88 km downstream and 24 km upstream?

Explanation

Given: Speed of boat in still water = 19kmph Speed of stream = 3kmph Formula: Downstream speed = Speed of boat in still water + Speed of stream Upstream speed = Speed of boat in still water - Speed of stream Calculation: Downstream speed = 19 + 3 = 22 kmph Upstream speed = 19 - 3 = 16kmph Required time = 88/22 + 24/16 = 4 + 3/2 = 5.5 ∴ total time (in hours) taken by the boat to go 88 km downstream and 24 km upstream is 5.5 hours.