Question

Find radius of a circle whose area is 61.6dm.sq.

Answer 1

1 dm=10 cm

1 dm²=100 cm²

61.6 dm²=6160 cm²

By formula,

Area=πr²

6160=22/7×r²

r²=6160×7/22

r²=1960

r=44.271 cm²

Hope it helps.

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