8. A boat takes 2 hours to go 10 km and come back
in still water lake. The time taken for going 10 km
upstream and coming back with water velocity of
5 km/h is :
(1) 140 min
(2) 150 min
(3) 160 min
(4) 170 min
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8. A boat takes 2 hours to go 10 km and come back
in still water lake. The time taken for going 10 km
upstream and coming back with water velocity of
5 km/h is :
(1) 140 min
(2) 150 min
(3) 160 min
(4) 170 min
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Answer:
Time taken for covering 10km= 2 hours
So distance covered in 1 hour=5km
Total distance covered =20km
Time taken - 140min
Answer:
Explanation:first calculate the speed of boat