the radii of two circle are 9cm and 12cm respectively.find the radius of the circle whose area is equal to the area of there two circles.
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3
area of c3 = ar (c1) +at(c2)
πr^2= πR^2 +πr^2
=π(R^2+r^2)
=π(81+144)
=π(225)
πr^2 =π(225)
r^2=225
r=√225
πr^2= πR^2 +πr^2
=π(R^2+r^2)
=π(81+144)
=π(225)
πr^2 =π(225)
r^2=225
r=√225
Answered by
0
the radius of circle is 15
then area = Πr^2 = 4950÷7
and area of two circles whose radius are 9 and 12 is
area = (1782÷7) + (3168÷7) = 4950÷7
then area = Πr^2 = 4950÷7
and area of two circles whose radius are 9 and 12 is
area = (1782÷7) + (3168÷7) = 4950÷7
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