Question

5$\pi \pi$

Answer 1

$\pi$ = 3.14

Substituting the values

5 × 3.14 × 3.14 = 49.298

Answer 2

5 x 22/7 x 22/7 =49.3480220054

Answer 3

$5\pi\pi=5\pi^2\\\\if\ we\ assume\ approximation\ of\ \pi:\\ \pi\approx3.14\ or\ \pi\approx\frac{22}{7}\ then:\\\\5\pi^2\approx5(3.14)^2=5(9.8596)=49.298\\\\5\pi^2\approx5\left(\frac{22}{7}\right)^2=5\left(\frac{484}{49}\right)=\frac{2420}{49}=49\frac{19}{21}$