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 4.8 cm2. Find the circumference of the circle, rounding your answer to 3 significant figures.

Solution

T h e a re a o f a c i rc l e i s 4.8 c m 2. F in d t h e c i rc u m f ere n ce o f t h e c i rc l e, ro u n d in g yo u r an s w er t o 3 s i g ni f i c an t f i gu res .

Solution

c i rc u m f ere n ce : 7.77 c m

Solution steps

Given:

a re a : 4.8 c m^{2}

Radius given

A re a = 4.8 : r = 1.23607 \dots

Circle circumference given

r = 1.23607 \dots : C = 7.76650 \dots

c i rc u m f ere n ce : 7.77 c m

Popular Examples

Tom is going for a walk. He walks 6.4 miles in 4 hours. what is his speed?seven times the difference of a number and 4 is no more than 10 two numbers are in ratio 1:1 and their sum is 15. Find the numbers Andrew is 6 years older than twice Maddy's age. If the sum of their ages is 78, how old is Maddy?10 is 20% of what number?:[?]