A man can row 8 km/hr in still water. If the speed of the current is 2 km/hr and it takes 4 hours to a man to row a place and come back, then how far is the place?
Answers
Answered by
1
The downstream speed = 8 + 2 = 10 km/hr and the upstream speed = 8 - 2 = 6 km/hr
Let the distance is 'x' km. We have
(x/10) + (x+6) = 4
⇒ x((3+5) / 30) = 4
⇒ x = (4*30) / 8 = 15km.
Answered by
5
Answer:
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Step-by-step explanation:
=> The downstream speed = 8 + 2 = 10 km/hr
and
=> the upstream speed = 8 - 2 = 6 km/hr
=> Let the distance is 'x' km.
=> We have
=> (x/10) + (x+6) = 4
⇒ x((3+5) / 30) = 4
⇒ x = (4 × 30) / 8
=> x = 120/8
=> x = 15km.
=> 15 km is right answer !
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