How many times a wheel of radius 21 cm must rotate to go 924 m ? (take pi = 22÷7
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Answer:
the wheel should be rotated 7 to cover 924m
Step-by-step explanation:
r=21
1 csa = 1 revolution
therefore,
csa of wheel=2×22/7×21
=132
therefore,
924÷132=7
therefore, wheel should be rotated 7 time to cover 924m
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