Question

find the surface of a circle whose radius is 49 mm.

Answer 1

$area \: of \: circle = 49 \times 49 = 2401$

Answer 2

here the question is wrong
I think that is a sphere



here is your answer
S.A of sphere=
$4\pi{r}^{2}$

$4 \times \frac{22}{7} \times {49}^{2}$
$4 \times \frac{22}{7} \times 49 \times 49$
$4312 \times 7$
34184