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A man drops a ball downside from the roo...

A man drops a ball downside from the roof of a tower of height `400` metres. At the same time another ball is thrown upside with a velocity `50 "meter"//sec` from the surface of the tower, then they will meet at which height from the surface of the tower.

A

100m

B

320m

C

80m

D

240m

Text Solution

Verified by Experts

The correct Answer is:
C
`h_1 + h_2 = 400 rArr 50t = 400 rArr r = 8 sec`
`h_2 = 400 - 1/2 xx 10 xx 64 = 80m`
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Knowledge Check

  • A ball is dropped from top of a tower 250 m high. At the same time, another ball is thrown upwards with a velocity of 50 ms^(-1) from the ground. The time at which they cross each other is

    A
    3 second
    B
    5 second
    C
    10 second
    D
    12 second

  • From the top of the tower of height 400 m , a ball is dropped by a man, simultaneously from the base of the tower, another ball is thrown up with a velocity 50 m//s . At what distance will they meet from the base of the tower ?

    A
    100 m
    B
    320 m
    C
    80 m
    D
    240 m

  • A ball is dropped from the top of a building of height 80 m. At same instant another ball is thrown upwards with speed 50 m/s from the bottom of the building. The time at which balls will meet is

    A
    1.6 s
    B
    5 s
    C
    8 s
    D
    10 s