Question
Find the minimum length of a rubber band which can tie
three circular pipe of radius 21 cm?Solution
length of arc. = θ/180 × π × r = 120/180 × 22/7 × 21 × 3 = 132 cm (take approximate value) Minimum length of rubber band = (42 + 42 + 42) + 132 = 258 cm
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