Question

What is the capacity of a bucket which if $45$ cm high if its radii at the ends are $28$ cm and $7$ cm?

• A. $48490.5$ cm${}^3$
• B. $5622.5$ cm${}^3$
• C. $4522.5$ cm${}^3$
• D. None of these

Answer 1

The correct option is A $48490.5$ cm${}^3$

R.E.F image

$V=\frac{\pi }{3}h(R^2+r^2+Rr)$

$\Rightarrow V=\frac{\pi }{3}\times 45[{28}^2+7^2+28\times 7]\Rightarrow V=48490.5$