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The diameter of a garden roller is 1.4m and it is 2m long . How much area will it cover in 5 revolutions ? (use pi = 22/7 .)

Answers (1)

D Deependra Verma

Solution: Clearly , Area Coverd = Coverd surface $imes$ Number of revolution.

Here , $r=frac1.42m = 0.7m$ and $h=2m.$

$herefore$ Curved surface $= 2pi rh$ $m^2$

$=2 imes frac227 imes 0.7 imes 2 =8.8m^2$

Hence , Area Covered = Curved surface $imes$ No. of revolutions $=$ $(8.8 imes 5)m^2= 44m^2$

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