Question

một mặt bàn hình tròn có diện tích 153.86 dm2 . tính chu vi mặt bàn đó.

Answer 1

Hai lần bán kính : 153,86 : 3,14 = 49 dm

Vậy bán kính sẽ là 7 ; vì 7 x 7 = 49 dm

Chu vi mặt bàn : 7 x 2 x 3,14 = 43,96 dm

Đáp số : 43,96 dm

Answer 2

43,96 đấy bạn 

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