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Question

A police jeep is chasing with, velocity of 45kmh a thief in another jeep moving with velocity 153kmh. Police fires a bullet with muzzle velocity of 180ms. The velocity it will strike the car of the thief is

A
150ms
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B
27ms
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C
450ms
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D
250ms
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Solution

The correct option is A 150ms
Effective speed of the bullet
= speed of bullet + speed of police jeep
=180ms+45kmh=(180+12.5)ms=192.5ms
Speed of thief ’s jeep = 153kmh=42.5ms
Velocity of bullet w.r.t thief's car = 192.542.5=150ms

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