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ML Aggarwal Solutions Class 9 Mathematics Solutions for Mensuration Exercise 16.3 in Chapter 16 - Mensuration

Question 3 Mensuration Exercise 16.3

Find the perimeter of a semicircular plate of radius 3.85 cm.

Answer:

It is given that

Radius of semicircular plate = 3.85 cm

M L Aggarwal - Understanding ICSE Mathematics - Class 9 chapter Mensuration Question 3 Solution image

We know that

Length of semicircular plat = πr

Perimeter = πr + 2r = r (π + 2)

Substituting the values

= 3.85 (22/7 + 2)

By further calculation

= 3.85 × 36/7

= 0.55 × 36

= 19.8 cm

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