A circle has a radius of 7 cm. Find it area. If the area become four times the previous area, find the radius of new circle
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Answer:
Area of circle = πr²
radius(r)= 7cm
∴ Area of circle = 22÷7 × 7 × 7
22×7= 154 cm
Now, A.T.Q.
4 × 154 = 616
616 = 22/7 × r
r = 616 × 7/22
r = 196 cm
Step-by-step explanation:
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