Questions
A swimmer wishes to cross a 500-m river flowing at 5 kmh-1. His speed with respect to water is 3 kmh-1. The shortest possible time to cross the river is
detailed solution
Correct option is A
Shortest time =dv=1/23=16 h=10 minTalk to our academic expert!
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The driver of a car moving towards a rocket launching with a speed of 6 ms-1 observed that the rocket is moving with speed of 10 ms-1.The upward speed of the rocket as seen by the stationary observer is nearly
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