Question

A conical cup has a circular base with diameter $21cm$ and height $1.8dm$. How much oil can it contain?

• A. $2079ml$
• B. $2078ml$
• C. $2077ml$
• D. $2069ml$

Answer 1

The correct option is A $2079ml$

$diameter=2$ radius
$r=10.5,h=1.8dm=18cm$
Volume of cone $=\frac{1}{3}\pi r^{2}h=\frac{1}{3}\pi \left({10.5}^2\right)\left(18\right)$
$=2079ml$