एक वृत्त का अर्द्धव्यास 4.5 सेमी है । उसकी परिधि ज्ञात करें।
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Answer:
198/7
Step-by-step explanation:
radius =4.5cm
we have to find the circference of the circle,
we know that circumference of a circle = 2πr
=2×22/7×4.5
=44/7×45/10
=198/7
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