Question Bank - General Aptitude

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Find the perimeter of the shape shown in figure. (? = 22/7)Note: All dimensions are in mm.

A.
170 mm
B.
100 mm
C.
390 mm
D.
280 mm

Solution:

Concept:Perimeter = Total length of the boundaryPerimeter of semi-circle = ?r Calculation:Given:From the given figure we have,Diameter of semicircular part D = 70.Radius of semicircular part r = 35.Perimeter of the shape = Perimeter of rectangular part + Perimeter of semicircular partPerimeter of the shape = (70 + 50 + 50) + (?r) = 170 + \(\frac {22}{7} \times 35\) = 280 mm.

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