Question

The area of the circle with diameter 10 ft is sq. ft. (round off to 2 decimal places)
$\text{[Take 𝛑=}\frac{22}{7}]$

• A. 31.4
• B. 78.57
• C. 39.28
• D. 15.7

Answer 1

The correct option is B 78.57

We know,

$\text{Radius =}\frac{Diameter}{2}$

$=\frac{10}{2}$

$\text{Radius =}5ft$

$\text{Area of a circle =}𝛑r^2$

$=\frac{22}{7}\times 5\times 5$

$=78.5714sq.ft$

∴ Area of the circle = 78.57 sq. ft