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Phổ biến Word Problems >

The đường kính of a circle is 3 ft. Find its area to the nearest whole number.The đường kính of a circle is 3 ft. Find its area to the nearest whole number.

Lời Giải

T h e d iam e t er o f a c i rc l e i s 3 f t . F in d i t s a re a t o t h e n e a res t w h o l e n u mb er . T h e d iam e t er o f a c i rc l e i s 3 f t . F in d i t s a re a t o t h e n e a res t w h o l e n u mb er .

Lời Giải

a re a : 7 f t^{2}

Các bước giải pháp

Given:

d iam e t er : 3 f t

Diện tích hình tròn đã cho

d = 3 : A = \frac{9 π}{4}

a re a : \frac{9 π}{4} f t^{2}

Làm tròn

\frac{9 π}{4}

tới gần nhất \mathrm{Số nguyên}:

7

a re a : 7 f t^{2}

Ví dụ phổ biến

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