11. The diameter of a garden roller is 1.4 m and its length is 2m. Find the number of revolutions
required to level a playground that has length 40 m and width 11m.
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Answer:
2πrh
2×22/7×0.7×2
61.6/7
8.8
l×b
40×11
440
no. of revolution
50 ya 0.02 answer hoga
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