The perimeter (in metres) of a semicircle is numerically

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The perimeter (in metres) of a semicircle is numerically equal to its area (in square metres). The length of its diameter is (take π = 22/7)

Using Rule 14,
Let the radius of the semi – circle ber metre.
According to the question, πr + 2r = πr²

= π + 2 = ×	πr²	⇒ 2π + 4 = πr
	2

r =	2π + 4	= 2 +	4	= 2 +	28	= 2 +	14	=	36
	π		π		22		11		11

∴ Diameter =	2 × 36	=	72	= 6	6	metres
	11		11		11