Question

find the radius of a semicircle if it's area is
(ii) 7700 cm2​

Answer 1

Answer:

70 cm

Step-by-step explanation:

Area of a semicircle = πr²/2

Answer 2

Answer

Step-by-step explanation:

Area of semicircle = pi r^2/2

So,

pi r^2/2=7700

pi r^2=7700*2

22/7*r^2=15400

r^2=15400*7/22

r^2=700*7

r^2=4900

r=root 4900

So,

r=70

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