Advertisements
Advertisements
Question
In the example given below, the radius of the base of a cylinder and its height is given. Then find the curved surface area and total surface area.
r = 70 cm, h = 1.4 cm
Solution
We know that,
Curved surface area = 2πrh
Total surface area = 2πr(h + r)
Here, r = 70 cm, h = 1.4 cm
Curved surface area of a cylinder = 2πrh
= `2 xx 22/7 xx 70 xx 1.4`
= `44 xx 14`
= 616 sq.cm.
Total surface area of a cylinder = 2πr(h + r)
= `2 xx 22/7 xx 70(1.4 + 70)`
= `440 xx 71.4`
= 31,416 sq.cm.
RELATED QUESTIONS
The curved surface area of a right circular cylinder of height 14 cm is 88 cm2. Find the diameter of the base of the cylinder.
Assume `pi = 22/7`
A milk tank is in the form of a cylinder whose radius is 1.5 m and length is 7 m. Find the quantity of milk in litres that can be stored in the tank?
A storage tank consists of a circular cylinder with a hemisphere adjoined on either end. If the
external diameter of the cylinder be 1.4 m and its length be 8 m, find the cost of painting it
on the outside at the rate of Rs. 10 per `m^2`.
Find the volume of a cylinder whose r = 3.5 cm, h = 40 cm .
Find the total surface area and whose height is 15 cm and the radius of the base is 7 cm.
A cylindrical tube, open at both ends, is made of metal. The internal diameter of the tube is 10.4 cm and its length is 25 cm. The thickness of the metal is 8 mm everywhere. Calculate the volume of the metal
A patient in a hospital is given soup daily in a cylindrical bowl of diameter 7 cm. If the bowl is filled with soup to a height of 4 cm, how much soup the hospital has to prepare daily to server 250 patients?
The radius of the internal and external surfaces of a hollow spherical shell are 3 cm and 5 cm respectively! If it is melted and recast into a solid cylinder of height `8/3` cm, find the diameter of the cylinder.
A square sheet of paper is converted into a cylinder by rolling it along its side. What is the ratio of the base radius to the side of the square?
If a rectangular sheet having dimensions 22 cm x 11 cm is rolled along its shorter side to form a cylinder. Then the curved surface area of the cylinder so formed is:
