The perimeter of a square is equal to twice the perimeter of a rectangle of length 8cm and breadth 7cm. What is the circumference of a semicircle whose diameter is equal to the side of the square ?
A) 55.12 cm
B) 22.54 cm
C) 42.51 cm
D) 38.57 cm
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1
4s=4(l+b)
therefore,
s=l+b
s=8+7
s=15
a. t. q
s=diameter of circle.
circumference of a circle.
pi*r
3.14*15/2
3.14*7.5
optionb is correct.
therefore,
s=l+b
s=8+7
s=15
a. t. q
s=diameter of circle.
circumference of a circle.
pi*r
3.14*15/2
3.14*7.5
optionb is correct.
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