The ratio of speed of a motorboat to that of the current of water is 55:7. The boat goes along with the current in 6 hours 24 minutes. It will come back in?
Answer & explanation
Correct answer: option 4
Speed ratio:
ATQ, Motorboat : Current
55 : 7
Then, Downstream : upstream
55 + 7 : 55 -7
62 : 48
Speed 31 : 24
Time 24 : 31 (If distance is constant, then ratio of speed = \(\frac{1}{ratio\;of\;time}\))
x16 ⇓ ⇓ x16
(given) 384 mins 496 mins or 8 hr16 mins