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The area of Television telecast is made ...

The area of Television telecast is made twice, the height of antenna will be changed as:

A

halved

B

doubled

C

quardupled

D

kept unchanged

Text Solution

Verified by Experts

The correct Answer is:
b
Area surrounding the `T.V` tower is
`A=pir^(2) (r=d)`
`pid^(2)= pi(sqrt(2hR))^(2) =pi.2hR`
`a prop h :. a'2a.h'=2h`
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