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TS
Find the circumference of the circle if its diameter is 42 cm.
136 cm
66 cm
132 cm
148 cm
None of these
Diameter of circle = 2r = 42 cm
Radius of circle = r = 42/2 = 21 cm
Circumference of the circle = $$2 \times \pi \times r$$
= $$2 \times \frac{22}{7} \times 21$$
= $$2 \times \frac{22}{1} \times 3$$
= 132 cm
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