Find the least number of coins of diameter 2.5 cm and height 3 mm.

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Find the least number of coins of diameter 2.5 cm and height 3 mm which are to be melted to form a solid cylinder of radius 3 cm and height 5 cm.

Solution:

Radius of a cylinder (r) = 3 cm
Height (h) = 5 cm

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 17 Mensuration Chapter Test Q18.1

A hemisphere of lead of radius 8 cm is cast into a right circular cone of base radius 6 cm. Determine the height of the cone correct to 2 places of decimal.

Solution:

Radius of hemisphere = 8 cm
Volume = \frac { 2 }{ 3 } \pi { r }^{ 3 }{ cm }^{ 3 }

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 17 Mensuration Chapter Test Q19.1

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