A) 12 km/hr
B) 11 km/hr
C) 13 km/hr
D) 14 km/hr
Correct Answer: B
Solution :
Let the speed of the steamer in still water be x km/hr. Speed of the stream = 1 Km/hr Downstream speed = (x + 1) km/hr Upstream speed = (x - 1) km/hr According to question, 5(x + 1) = 6(x- 1) \[\Rightarrow 5x+5=6x-6\] \[\Rightarrow 5+6=6x-5x\Rightarrow x=11\] Hence, the speed of the steamer in still water is 11 km/hr.You need to login to perform this action.
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