Find

(i) The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high.

Find

(i) The lateral or curved surface area of a closed cylindrical petrol storage tank that is 4.2 m in diameter and 4.5 m high.

^{3}^{} is immersed in a half filled rectangular tank of dimentions 20cmx12cmx14cm.Find the rise in water level.[Ans.Height = 20 m, R = 17.5 m]No links please.Solve this:9) S.A. of sphere; r = 12 cm, is 5 times the C.S.A. of a cone of radius 11 cm. Find h and v of cone ?

Q. Some poor children use recycled paper to make - conical party caps with radius 7 cm and slant height 15 cm and sell it on a street stall.

(a) How much would they earn profit on selling 50 caps? The selling price of cap is 50 paise per $c{m}^{2}$, while it costs Rs. 10 per 100 $c{m}^{2}$?

(b) Which value is depicted by the children?

Q. A juice seller has 3 types of glasses of inner diameter 5cm to serve the customers. The height of the glasses is 10 cm. He decided to serve the customers in A type of glasses.

The 3 types of glasses are:

Type A glasses is with a plane bottom.

Type B glass is with hemispherical raised bottom.

Type C glass is with conical raised bottom of height 1.5 cm.

(a) Find the volume of each type of glasses (take pi = 3.14)

(b) By choosing a glass of type A, which value is depicted by juice seller

Q. A juice seller has 3 types of glasses of inner diameter 5cm to serve the customers. The height of the glasses is 10 cm. He decided to serve the customers in A type of glasses.

The 3 types of glasses are:

Type A glasses is with a plane bottom.

Type B glass is with hemispherical raised bottom.

Type C glass is with conical raised bottom of height 1.5 cm.

(a) Find the volume of each type of glasses (take pi = 3.14)

(b) By choosing a glass of type A, which value is depicted by juice seller

14. A rectangular strip, 16 cm x 3.5 cm is rotated about the longer side. Find the whole surface of the solid so generated.

Q.13. Find the volume of a sphere whose surface area is 55.44$c{m}^{2}$.