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Phổ biến Word Problems >

The area of a circle is 81𝜋 square feet. What is the đường kính?

Lời Giải

T h e a re a o f a c i rc l e i s 81​𝜋 s q u a re f ee t . Wha t i s t h e d iam e t er ?

Lời Giải

d iam e t er : 18 f t

Các bước giải pháp

Given:

a re a : 81 π f t^{2}

Bán kính đường tròn đã cho

A re a = 81 π : r = 9

Đường kính hình tròn đã cho

r = 9 : d = 18

d iam e t er : 18 f t

Ví dụ phổ biến

Three more than double a number sally has 2 apples and john has 2. how many all together the sum of 10,3 and a number is 200 3 years from now Pearl will be 35 years old.The current sum of the ages of Pearl and Maria is 60.How old is Maria right now?Tyler's savings account pays a simple annual interest rate of 3.25%. Suppose he deposits 5,000 in the account and makes no additional deposits or withdrawals for 3 years. What will the total value of the account be after 3 years?