154 sq. cm is the area of a circle so find its radius

Question

2 years ago

11

%7D" id="TexFormula1" title="\pi =\frac{22}{7}" alt="\pi =\frac{22}{7}" align="absmiddle" class="latex-formula">

1 answer:

Zina [86] · Answer 1 · 2022-11-24T00:00:39+03:00

Answer:

r = 7 cm

Step-by-step explanation:

The area (A) of a circle is calculated as

A = πr² ( where r is the radius )

Given A = 154 , then

πr² = 154 , that is

$\frac{22}{7}$ r² = 154 ( multiply both sides by 7 to clear the fraction )

22r² = 1078 ( divide both sides by 22 )

r² = 49 ( take square root of both sides )

r = $\sqrt{49}$ = 7 cm