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A tower of height 30 metres casts a shad...

A tower of height 30 metres casts a shadow of length 40 meters at a certain instant. When the sun's elevation increases by `Tan^(-1)"1/7`, the length of the shadow cast by the tower, in meters is

A

`20`

B

`25`

C

`30`

D

`45`

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

  • If a pole height 6m casts a shadow 2sqrt(3) m long on the ground, then the sun's elevation is

    A
    `30^(@)`
    B
    `60^(@)`
    C
    `45^(@)`
    D
    `90^(@)`

  • The length of the shadow of a tree is 7m and height is 7m, when the sun's elevation is………….

    A
    `45^(@)`
    B
    `60^(@)`
    C
    `70^(@)`
    D
    `90^(@)`

  • If the angle of elevation of sun increases from 0^(@)" to "90^(@) , then the length of shadow of the tower………..

    A
    no change
    B
    increases
    C
    decreases
    D
    can't be decided

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