8. The diameter of a roller is 84 cm and its
length is 120 cm. It takes 500 complete
revolutions to move once over to level a
playground. The area of the playground in
sqm is *
1584
1284
1384
1184
Answers
Answered by
1
Step-by-step explanation:
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Answered by
2
Answer:
1584
Step-by-step explanation:
Roller is of from cylinder
Radius=Diameter/2
=84/2
42cm
Area of roller=curved surface of cylinder
=(2*22/7*42*120)cm2
=31680cm2
area of one revolution=area of roller=31680cm2
area of 500 revolution=500*31680cm2
area of playground =15840000cm
=15840000*1/100*1/100m2
=1584m2
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