Mathematics in Ancient and Medieval India c6.s9.108

c6.s9.108

where r, R denote the radii of the upper and lower face and π = √10, the value adopted by Śrīdhara. It also reappears in the works of Āryabhaṭa II³ and Mahāvīra.⁴ Brahmagupta⁵ followed by Mahāvīra⁶ gave a general method of calculating the volume of frustum of a solid, such as a pyramid, a cone and a wedge whose upper and lower faces are parallel. He first The formula for the volume of a truncated wedge (frustum of a pyramid) is given in the *Chiu-Chang Suan-Shu*¹ and *Mong-hsia Pi-t'an*² of Ch'en Huo (died in 1075 A. D.) as