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Question

# A police jeep is chasing with velocity of 45 km/h a thief in another jeep moving with velocity 153 km/h. Police fires a bullet with muzzle velocity of 180 m/s. The velocity with which is will strike of the car of the thief is

A
150 m/s
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B
27 m/s
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C
450 m/s
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D
250 m/s
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Solution

## The correct option is A 150 m/sEffective speed of the bullet = Speed of bullet + Speed of police jeep = 180 m/s + 45 km/h = (180 + 12.5) m/s = 192.5 m/sSpeed of thief's jeep = 153 km/h = 42.5 m/sVelocity of bullet w.r.t.thief's car = 192.5-42.5 = 150 m/s

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