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ML Aggarwal Solutions Class 9 Mathematics Solutions for Mensuration Exercise 16.3 in Chapter 16 - Mensuration
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Find the perimeter of a semicircular plate of radius 3.85 cm.
Answer:
It is given that
Radius of semicircular plate = 3.85 cm
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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