The downstream speed of a boat is 35 km/hr. Speed of stream is 5 km/hr. What will be the total time (in hours) taken by the boat to cover 350 km downstream and 150 km upstream?
Show answer & explanation
Correct answer: B
Explanation
Upstream speed = 35 – 10 = 25 km/hr
Downstream time = 350 ÷ 35 = 10 hours
Upstream time = 150 ÷ 25 = 6 hours
Total time = 16 hours