Chapter 14 - Mensuration

Example 3. If the radii of the circular ends of a bucket, 45cm high, are 28cm and 7cm, find the capacity of the bucket.

Solution:- Height, h = 45cm

Radius, R = 28cm

Radius, r = 7 cm

capacity of the bucket

= 1/3 X 22 X 45 X 7 X 21

= 48510 cm3

Example 4. A solid sphere of radius 3cm is melted and then cast into small spherical balls each of diameter 0.6cm. Find the number of small balls thus obtained.

Solution:- Let number of small balls be x

Volume of x small balls = Volume of sphere

 

Maths by Mr. M. P. Keshari
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Subjects Maths (Part-1) by Mr. M. P. Keshari
Chapter 9 Circle
Chapter 10 Tangents to a circle
Chapter 11 Geometrical Construction
Chapter 12 Troigonometry
Chapter 13 Height and Distance
Chapter 14 Mensuration
Chapter 15 Statistics
Chapter 16 Probability
Chapter 17 Co-ordinate Geometry