Which of the following is the volume of a sphere of radius 7.5 ft?

It is given a sphere with radius = 7.5 ft.
Using formula volume of sphere =

\frac{4}{3} π r^{3}

r = radius

.
Substituting the given values,

\Rightarrow V = \frac{4}{3} \times 3.14 \times {7.5}^{3}

\Rightarrow V = \frac{4}{3} \times 7.5 \times 7.5 \times 7.5 \times 3.14

\Rightarrow V = \frac{4}{3} \times 421.875 \times 3.14

\Rightarrow V = \frac{5298.75}{3}

\Rightarrow V = 1766.25 f t^{3}

Hence, the volume of sphere of radius 7.5

ft

1766.25 f t^{3}

.
Therefore, option 4 is correct.

Which of the following is the volume of a sphere of radius 7.5 $ft$ ?