Question

A petrol tank is a cylinder of base diameter 21cm and length 18 cm fitted with conical end each of its axis length 9 cm find capacity of tank

Answer 1

H1,height of cone=9cm
H2,height of cylinder=18cm
radius of cone =radius of cylinder =21/2
volume=
$\pi {r}^{2} h + \pi {r}^{2} h \div 3$
=22/7*21/2*21/2*18+22/7*21/2*21/2*9*1/3
=14553/2
=7276.5cm^3