The radii of two cylinders are in the ratio 2 : 3.

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The radii of two cylinders are in the ratio 2 : 3 and their heights are in the ratio 5 : 3. The ratio of their volumes is
(a) 10: 17
(b) 20: 27
(c) 17: 27
(d) 20: 37

Solution:

Radii of two cylinder are in the ratio = 2 : 3
Let radius (r1) = 2x
and radius (r2) = 3x
Ratio in their height = 5 : 3
Let height of the first cylinder = 5y
and of second = 3y
Now, volume of the first cylinder

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 17 Mensuration MCQS Q5.1

The total surface area of a cone whose radius is \\ \frac { r }{ 2 } and slant height 2l is
(a) 2πr (l + r)
(b) \pi r\left( l+\frac { r }{ 4 } \right)
(c) πr(l + r)
(d) 2πrl

Solution:

Radius of a cone = \\ \frac { r }{ 2 }
and slant height = 2l
total surface area of a cone

ML Aggarwal Class 10 Solutions for ICSE Maths Chapter 17 Mensuration MCQS Q6.1

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