Diameter and length of a roller are 84 cm and 120 cm respectively in how many revolutions can the roller level the playground of area 1584 cm2.
Answers
Answered by
10
heya frnd!
here's ur answer...
given diameter of the roller is 84cm
therefore radius of the roller=84/2
=42cm
height (length) of the roller=120cm
CSA of the roller=2πrh
=2×22/7×42×120
=44×6×120
=31680cm²
in metres=316.8m²
therefore no. of revolutions it will take to cover 1584m²=1584/316.8
=5
hence it will take 5 revolutions to cover 1584m².
I think it should be 1584m² not 1584cm²
hope this helps..!
_____★☺☺☺★_____
here's ur answer...
given diameter of the roller is 84cm
therefore radius of the roller=84/2
=42cm
height (length) of the roller=120cm
CSA of the roller=2πrh
=2×22/7×42×120
=44×6×120
=31680cm²
in metres=316.8m²
therefore no. of revolutions it will take to cover 1584m²=1584/316.8
=5
hence it will take 5 revolutions to cover 1584m².
I think it should be 1584m² not 1584cm²
hope this helps..!
_____★☺☺☺★_____
Similar questions