Swati cuts out three SEMI-CIRCULAR pieces of radius 5 cm from a large sheet of paper. She then sticks them on a piece of cardboard to form a design in such a way that there is no overlap. What is the perimeter of the shape (in cm)? a) 15π b) 30π c) 15π+10 d) 30π+10
Answers
perimeter of the shape = 15π + 10 cm
Step-by-step explanation:
Perimeter = Perimeter of Circle + Perimeter of Semicicrle + Diameter
= 2πR + (1/2)2πR + 2R
= 2π(5) + π5 + 2*5
= 15π + 10
perimeter of the shape = 15π + 10 cm
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Perimeter of the semi-circular sheets is (15π) cm.
Step-by-step explanation:
Given:
Radius of semi circle = 5 Cm
Find:
Total perimeter of the semi-circular sheets = ?
Computation:
Total perimeter of the semi-circular sheets = 3 × Perimeter of semi Circle
Total perimeter of the semi-circular sheets = 3 × πR
Total perimeter of the semi-circular sheets = 3 × π(5)
Total perimeter of the semi-circular sheets = 15π
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