Sun	Mon	Tue	Wed	Thu	Fri	Sat
23	24	25	26	27	28	1
2	3	4	5	6	7	8
9	10	11	12	13	14	15
16	17	18	19	20	21	22
23	24	25	26	27	28	29
30	31	1	2	3	4	5

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Multiple Choice Questions

The speed of a motor boat is that of the current of water as 36 5 The boat goes along with the curre...........

Quantitative Aptitude (HAS) Boats and Streams

The speed of a motor-boat is that of the current of water as 36 : 5 The boat goes along with the current in 5 hours 10 minutes. It will come back in

5 hrs 50 min

6 hrs

6 hrs 50 min

12 hrs 10 min

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Explanation:

Since the ratio is given 36 : 5
Let the speed of boat in still water = 36 km/h.
and the speed of the stream = 5 km/h
Downstream speed = 41 km/h
Upstream speed = 31 km/h
Distance = Downstream speed × Downstream time = (41 × 31/6) km.
Upstream time = Distance/ Upstream = [41 × (31/6)]/31 = (41 × 31)/6 × 3
= 41/6 = 6 hrs. 50 min.

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