diameter and length of a roller are 84cm and 120cm respectively. in how many revolutions, can the roller level the playground of area 1584m2
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diameter of roller=84cm
height of roller=120cm
radius=84÷2=42cm
c.s.a.=2pie×r×h
2×22%7×42×120
=31680 Sq. cm
we will convert 1584 Sq. m into cm
that is 15840000 Sq. cm
required answer=15840000÷31680
=500 revolutions
☺hope this will help you
height of roller=120cm
radius=84÷2=42cm
c.s.a.=2pie×r×h
2×22%7×42×120
=31680 Sq. cm
we will convert 1584 Sq. m into cm
that is 15840000 Sq. cm
required answer=15840000÷31680
=500 revolutions
☺hope this will help you
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