a river 4 miles wide is following at rate of 2 miles/hr . The minimum time taken by a boat to cross the river with a speed v = 4 miles / hour (in still water ) is approximately (a) 1 hr 9 min(b) 2 hr 7 min(C) 1 hr 12 min(d) 2 hr 25 min
a river 4 miles wide is following at rate of 2 miles/hr . The minimum time taken by a boat to cross the river with a speed v = 4 miles / hour (in still water ) is approximately
(a) 1 hr 9 min
(b) 2 hr 7 min
(C) 1 hr 12 min
(d) 2 hr 25 min
Gurpreet Singh , 10 Years ago
Grade 9
