A balloon was moving upwards with a uniform velocity of 10m/s. An object of finite mass is dropped from the balloon when it was at a height of 75m from the ground level. The height of the balloon from the ground when object strikes the ground was around (takes the value of g as 10m/s 2 )
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C
Object is projected as shown so as per motion under gravity 
Object takes t=5s to fall on ground Height of balloon from ground H=75+ut
= 75 + 10 × 5 = 125 m
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