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Question

ΔABCΔPQR and areas of two similar triangles are 64sq.cm and 121sq.cm respectively. If QR=15cm, then find the value of side BC.

A
12011
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B
11811
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C
11511
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D
11111
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Solution

The correct option is A 12011
ABCPQR ...Given
By theorem on ratio of similar triangles,

Area(ΔABC)Area(ΔPQR)=BC2QR2

64121=BC2(15)2

811=BC15

BC=12011cm.

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