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Activity Discussion Math Class 8: Mensuration

• # Class 8: Mensuration

Posted by on June 23, 2023 at 4:23 pm

A cylindrical water tank has a diameter of 1.4 meters and a height of 2 meters.

Find its capacity in liters (take π as 22/7).

replied 1 year, 1 month ago 2 Members · 1 Reply
• ### Ananya

Member
June 23, 2023 at 7:49 pm
3

Diameter of a cylindrical water tank is 1.4m , and radius of a cylinder is half of its diameter .

Therefore, radius of cylindrical water tank = 1.4/2 = 0.7m .

Height of the cylindrical water tank is 2m.

Capacity of the cylindrical water tank can be calculated by the formula :

( π r^2h )

Where, r is the radius of cylindrical water tank and h is the height of the cylindrical water tank .

• r^2 = 0.7 * 0.7 = 0.49m^2

• Capacity of cylindrical water tank=

π *( r^2 )*h

= (22/7)*(0.49)(2)

= (22)(0.07)(2)

=(44)(0.07)

= 3.08m^3

• 1m^3 = 1000litre

To convert metre cube into litre , we have to multiply it by 1000 .

Therefore, capacity of cylindrical water tank is 3080litres.

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