A triangle ABC with side 5cm, 12cm and 13cm is revolved about the side

1.	A triangle ABC with side 5cm, 12cm and 13cm is revolved about the side 5cm. Find the volume of solid so obtained.
Answer» Triangle is rotated about the side 5 cm. Since it is a right angle triangle => cone is formed of height = 5cm and base radius = 12cm volume of cone = πr^2h/3= 22×12×12×5/21 = 754.28cm^3 with diagram

A triangle ABC with side 5cm, 12cm and 13cm is revolved about the side 5cm. Find the volume of solid so obtained.

Answer»

Triangle is rotated about the side 5 cm.

Since it is a right angle triangle => cone is formed of height = 5cm and base radius = 12cm

volume of cone = πr^2h/3= 22×12×12×5/21 = 754.28cm^3

with diagram