RRB Assistant Loco Pilot and Technician Model Paper 8 with solutions

Question : 8 of 75

Marks: +1, -0

The radius of a semicircular disc is 10.5 cm. The perimeter of the disc is

Solution:

r = 10.5 cm
perimeter of semicircular disc = (πr + 2r)
=

22/7

·10.5 + 2 × 10.5
= 33 + 21 = 54 cm

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