Answers

2016-02-07T10:34:37+05:30
Area of first circle= \pi
                            = \pi *64=64 \pi
Area of second circle= \pi
                                   = \pi *36=36 \pi
Sum=100 \pi
Area of final circle=100 \pi
100 \pi = \pi
∴r²=100
∴r=10cm
∴Radius of required circle is 10cm








0
2016-02-07T10:46:33+05:30
radii of first circle=8cm
area of first circle=πr² =π(8)²=π64 cm²
radii of second circle =6cm
area of second circle=πr²=π(6)²=π36cm²
Sum of two circles=π64+π36=π[100] cm²
now,area of sum of two cirlces=100π=πr²
⇒r²=100
⇒r=10cm
0
plz mark brainlest
Its wrong
r=10cm not 10pie