Question

A conical pit of top diameter 3.5m is 12m deep. What is its capacity in kilometer?

Answer 1

The capacity in km is 3.85 × 10^-8km³......

Answer 2

Diameter of pit = 3.5 m

Radius =

$\frac{35}{20} = \frac{7}{4}$

Height = 12 m

$\colorbox{orchid}{volume \: of \: cone = }{\frac{1}{3} \pi {r}^{2} }h$

$= \frac{1}{3} \pi (\frac{ {7}^{2} }{4}) \times 12$

$= \frac{22}{7} \times \frac{7}{4} \times \frac{7}{4} \times 4$

$\frac{77}{2}$

$\colorbox{yellow}{volume} \: = 38.5 \: {m}^{2}$

In kilolitres = 38.5 kilometers

= 38.5 kl