The capacity of a cylindrical tank to store the liquid of the diameter 30 cm and height 50 cm is : [Take π = 3.14]
⇒ Volume of cylinder (V) = πr2h (where, r = radius of the cylinder = 30/2 = 15 cm, h = height of the cylinder = 50 cm)
⇒ V = πr2h = 3.14 × 15 × 15 × 50 = 35325 cm3
As we know,
⇒ 1 m = 100 cm
⇒ 1 m3 = 106 cm3
Similarly,
⇒ 1 liter = 1000 milliliters
For conversion,
⇒ 1 m3 = 1000 liters
⇒ 106 cm3 = 1000 × 1000 milliliters
⇒ 106 cm3 = 106 ml
⇒ 1 cm3 = 1 ml
∴ Capacity of tank = 35325 ml
4. If the radius of a sphere is increased by 20% then find the increment in its surface area?
5. If the length of each side of a regular tetrahedron is 12 cm, then the volume of the tetrahedron is
10. 48. If the volume and surface area of a sphere are numerically the same, then its radius is :