A bicycle wheel has a diameter (including the tyre) of 70 cm. how many times would the wheel rotate to cover a distance of 4.4 km?
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4.4km=4.4×1000×100cm
1 rotation=2×22/7×70=440
rotation req=440000/440
=1000
1 rotation=2×22/7×70=440
rotation req=440000/440
=1000
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