the diameter of a cylindrical roller is 9.1 cm and is 2.8 M long find the area it will cover in 30 revolutions
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1
Answer:
diameter =9.1cm
height=2.8×100=280cm
area covered by 1 rev.=(22×9.1×9.1*280)/7×2×2
=18,218.2cm^2
area covered by 30 revolution =30×18218.2=546546
Answered by
2
diameter =9.1cm
hight=2.8m=2.8*100=280
volume
=22/7*(4.55)'2*280
=22*20.70*40
=455.455*40
=18218.2 cm'2
the revolving the area by roller
=18218.2*30
=546546
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