Question

A solid metallic sphere of diameter 21 cm is melted a recast into a number of smaller cones each of radius 3.5cm and height 3cm find the number of cones formed what will cost if 27 such cone if cost of one cone is rupees 10

Answer 1

Answer:

Step-by-step explanation:

Volume of sphere is 4851

Volumes of cone is 9•625

485/8•625 =564us answer

Answer 2

given: diameter of sphere=21cm

radius of sphere =21/2

height of cone =3 cm

radius of cone =3.5 cm

number of cones =volume of sphere /volume of cone

=4/3×22/7×21/2×21/2×21/2/1/3×22/7×3.5×3.5×3=126 Ans

if cost of 1 cone is =10Rs

27 cone cost is = 27×10=270Rs Ans