the hourand minute hands of clock are4.2 cm and 7 cm long respectively. find the sum of the distance covered by their tips in one day
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2×circumference of circle+2×circumference of circle
2×2×22/7×4.2+2×2×22/7×7
2×2×22/7(4.2+7)
88/7×11.2
88×1.6
140.8cm
2×2×22/7×4.2+2×2×22/7×7
2×2×22/7(4.2+7)
88/7×11.2
88×1.6
140.8cm
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