One circular sewer has diameter 300 m and other has diameter 600 mm in both run half what will be the ratio of
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first circular sewer diameter=300m
radius=150m
circumference=2πr
therefore, circumference=2π×150m
A/Q,run half of it's sewer=π×150m
&,other has diameter=600m
radius=300m
therefore, circumference=2π×300m
A/Q, run half of it's =π×300m
Hence there ratio will be=1:2
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