Physics
An enemy plane is at a distance of 300 km from a radar. In how much time the radar will be able to detect the plane? Take velocity of radio waves as 3 x 108 m s-1.
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ICSE 2017
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Answer
Given,
Distance d = 300 km,
Velocity V = 3 x 108 m s-1
If it takes time t for the signal to go up to the enemy plane and come back, then
Hence, the radar will detect the enemy plane in 2 x 10-3 s
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