Mensuration-(FORMULA'S)

Question 1

Volume(v) of solid right circular cylinder.

Answer 1

πr²h

Question 2

Lateral or curved surface area of solid right circular cylinder

Answer 2

2πrh

Question 3

Total surface area of solid right circular cylinder

Answer 3

2πr(h+r)

Question 4

Thickness(W) of hollow right circular cylinder

Answer 4

W=(R-r)

Question 5

Volume of the hollow right circular cylinder

Answer 5

π(R² - r²)h

Question 6

External curved surface area of hollow right circular cylinder

Answer 6

2πRh

Question 7

Internal curved surface area of right circular cylinder

Answer 7

2πrh

Question 8

Total surface area of hollow right circular cylinder

Answer 8

{2π(R + r)h + 2π(R²- r²)

Question 9

Slant height of cone(l)

Answer 9

L= root of h²+ r²

Question 10

Volume of cone

Answer 10

V=1/3πr²h

Question 11

Curved surface area or lateral surface area of cone

Answer 11

πrl

Question 12

Total surface area of cone

Answer 12

πr(l+r)

Question 13

Volume of sphere

Answer 13

(V)=4/3πr³

Question 14

Surface area of sphere

Answer 14

(S)=4πr²

Question 15

Thickness of spherical shell

Answer 15

W=R-r

Question 16

Volume of spherical shell

Answer 16

V=4/3π(R³-r³)

Question 17

Exterior surface area of spherical shell

Answer 17

4πR²

Question 18

Interior surface area of spherical shell

Answer 18

4πr²

Question 19

Volume of hemisphere

Answer 19

V = 2/3πr³

Question 20

Curved surface area of hemisphere

Answer 20

2πr²

Question 21

Total surface area of hemisphere

Answer 21

3πr²