# A Petrol Tank is a Cylinder of Base Diameter 21 Cm and Length 18 Cm Fitted with Conical Ends Each of Axis Length 9 Cm. Determine the Capacity of the Tank. - Mathematics

A petrol tank is a cylinder of base diameter 21 cm and length 18 cm fitted with conical ends each of axis length 9 cm. Determine the capacity of the tank.

#### Solution

To find the total capacity of the tank, we have to add the volume of the cylinder and cone.

Diameter of the cylinder, d = 21 cm

Radius of the cylinder, r=d/2=21/2cm

Height of the cylinder, h1 = 18cm

Also, radius of cone, r =21/2cm

Height of the cone, h2 = 9 cm

now,

Total capacity of the tank= Volume of the cylinder + Volume of 2 cones

pir^2h_1+2xx1/3pir^2h^2

=pir^2(h_1+2/3h_2)

=22/7xx(21/2)^2xx(18+2/3xx9)

22/7xx(21/2)^2xx24

= 8316 cm3

Hence the total capacity of the tank is 8316 cm3.

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#### APPEARS IN

RD Sharma Class 10 Maths
Chapter 14 Surface Areas and Volumes
Exercise 14.2 | Q 9 | Page 61