द पेरीमीटर ऑफ ए रैक्टेंगुलर पीस ऑफ कार्डबोर्ड 6 मीटर 1 मीटर फाइंड इट्स लेंथ
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Answered by
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Step-by-step explanation:
Length of cardboard
= 2(l+b)
=2*(6+1)
=2*7
=14 Ans
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