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Maths Puzzle
two circles of radius 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 fo a square with one side PQ, is
Read Solution (Total 2)
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- Length of common Tangent of two externally touching circles = √(4×r1×r2)
--------> where r1 and r2 are radius of circles
=> Length of Tangent = √(4×9×4) = 12 cm
=> Area = 144 sq.cm - 12 years agoHelpfull: Yes(4) No(8)
- √(r1+r2)^2-(r2-r1)^2
Area= ans^2 - 8 years agoHelpfull: Yes(1) No(2)
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