Math, asked by rohit2912, 10 months ago

find the diameter of a circle whose area is twice the area of a circle of radius 21 CM

Answers

Answered by ashishrokade190

2

radius=diameter÷2

$21 \div 2= 10.5$

10.5cm is radius of circle

Answered by raiyanmatadar

1

Answer:

Step-by-step explanation:

Area of large circle=2*area of small circle

πrr=2*πrr

22÷7*r*r=2×22÷7*21*21

rr=882

D=√882*2

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