9th mathematics NCERT exercise questions with answers, Mathematics

Surface Area and Volumes – Exercise 13.7 – Class IX

Assume π = 22/7 , unless stated otherwise. Find the volume of the right circular cone with (i) radius 6 cm, height 7 cm (ii) radius 3.5 cm, height 12 cm Solution: (i) r = 6 cm; h = 7cm Volume of the cone = 1/3πr2h = 1/3 x 22/7 x 62 x 7 =… Continue reading Surface Area and Volumes – Exercise 13.7 – Class IX