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sagar

· started a discussion

· 1 Months ago

answer need (Question: 200763.0 )

give soln

Question:
Two circles of radii 4 cm and 9 cm respectively touch each other externally at a point and a common tangent touches them at the points P and Q respectively. Then the area of a square with one side PQ, is –
Options:
A) 72 sq. cm 
B) 144 sq. cm 
C) 97 sq. cm 
D) 194 sq. cm 
Solution:
Ans: (b) 


So, the area of square with side PQ = (12)2 = 144 cm2

Vineet

· commented

· 1 Months ago

PO^2 = distance between center^2 - (R - r)^2

poonam kumari

· commented

· 1 Months ago

Yet to be approved!
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