Question

find the are of a circle whose diameter is 7 km​

Answer 1

$\huge \sf \green{Hello \: mate}$

GIVEN :

Diameter of circle = 7 km

SOLUTION :

So , by the help of diameter we can find radius of circle . As we know that formula for finding radius is $\frac{diameter}{2}$

$\sf{ radius = \frac{7}{2} = 3.5}$

$\sf{area \: of \: circle \: = \pi {r}^{2} }$

{ π = 3.14}

$\sf{ = \: 3.14 \times ({3.5})^{2} } \\ \\ \sf { \: = \: 38.465 }$

Hence, the area of circle whoes diameter is 7km is 38.465