alleryशांत पाण्यातील वेग 15 km/h असलेली एक बोट प्रवाहाच्या दिशेने 40 km जाते आणि परत येते, प्रवाहाचा वेग 5 km/h आहे. एकूण वेळ किती लागेल?
A8 hours
B7 hours
C5 hours
D6 hours
Answer & Solution
Correct answer: D. 6 hours
प्रवाहाच्या दिशेने 40 / 20 = 2 h आणि प्रवाहाच्या विरुद्ध दिशेने 40 / 10 = 4 h, एकूण 6 hours.
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