The time taken by a boat to cover 48 KM down stream and 36 KM up stream is 10 hr. If the speed of the boat in still water is 9 KM/hr.Find the time taken by the boat to cover 60 KM down stream.
Answers
Answer:
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Step-by-step explanation:
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Speed of a boat in standing water is 14 kmph and the speed of the stream is 1.2 kmph. A man rows to a place at a distance of 4864 km and comes back to the starting point. The total time taken by him is:
A. 1400 hours B. 350 hours
C. 700 hours D. 1010 hours
answer with explanation
Answer: Option C
Explanation:
Speed downstream = (14 + 1.2) = 15.2 kmph
Speed upstream = (14 - 1.2) = 12.8 kmph
Total time taken
=
4864
15.2
+
4864
12.8
= 320 + 380 = 700 hours