en

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Popular Word Problems >

The area of a circle is 81pi in². What is the circumference, in inches? Express your answer in terms of pipi

Solution

T h e a re a o f a c i rc l e i s 81 π i n^{2} . Wha t i s t h e c i rc u m f ere n ce, in in c h es ? E x p ress yo u r an s w er in t er m s o f p iπ

Solution

c i rc u m f ere n ce : 2 π \frac{i n ^{2}}{π}

Solution steps

Given:

a re a : i n^{2}

Radius given

A re a = i n^{2} : r = \frac{n ^{2} i}{π}

Circle circumference given

r = \frac{i n ^{2}}{π} : C = 2 π \frac{n ^{2} i}{π}

c i rc u m f ere n ce : 2 π \frac{i n ^{2}}{π}

Popular Examples

A number is 9 more than another number. Twice the sum of the two numbers is 14 . Find the two numbers.sally has 3 apples bob has four apples how many apples does bob and sally have ?Travis traveled 290 miles in 5 hours. What is his unit rate of speed in miles per hour?Wyatt opened a savings account and deposited 800.00. The account earns 11% interest, compounded monthly. If he wants to use the money to buy a new bicycle in 2 years, how much will he be able to spend on the bike?five less than a certain number is 9 less than three times the number. Write an equation and solve it to find the number