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Mathematics 34 Online
OpenStudy (anonymous):

The diameter of a road roller is 140cm and its length is 2.2m. It takes 400 complete revolutions to move over to level a stretch of a road 2.2m wide find the surface area of stretch of road leveled in m sq.

OpenStudy (anonymous):

one sec

OpenStudy (anonymous):

The area of each circle is A = πr2. The area of the rectangle is A = πdh.

OpenStudy (anonymous):

but roller is in shape of cylinder

OpenStudy (anonymous):

yes

OpenStudy (anonymous):

so how to solve it

OpenStudy (anonymous):

It should have the radius

OpenStudy (anonymous):

diamter / 2 = radius

OpenStudy (anonymous):

here radius = 0.7m

OpenStudy (mertsj):

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