Question

If the area of a semi - circle is 308 cm square, calculate its radius. ( use pi = 22/7)​

Answer 1

The answer for radius is 13cm

Explanation:

Area of semi circle=1/2pir²

308=1/2×22/7×r²

308=22r²/14

22r²=4312

divide both sides by 22

22r²/22=4312/22

r²=196

take the square root of both sides

√r²=√196

r=14cm