the diameter of a roller is 84cm and its length is 120 cm It takes 500 complete Revolution to move once over to level up playground find the area of the playing ground in metre square
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Answer: 158400meter square
Step-by-step explanation:
The diameter of a roller is 84 cm
So radius is 42 cm
Height or length is 120 cm
Roller is a form of cylinder
Lateral surface area of cylinder is 2πrh=2*22/7*42*120
=31680 sq.cm
500 revolutions take place to complete a ground...
Therefore area of ground is 500*31680 =15840000 sq.cm
=158400 sq.m
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