The diameter of a garden roller is 1.4 m and it is 2 m long.

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asked Mar 15 in Class X Maths by navnit40 (-3,330 points)

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

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answered Mar 15 by navnit40 (-3,330 points)

Clearly,

Area covered = Curved surface area × No. of revolutions

Here,   r = 1.4/2m = 0.7 m and h = 2 m

∴   Curved surface area = 2πrh = 2 × 22/7 × 0.7 × 2 m2

= 8.8 m2

Hence, area covered = 8.8 m2 × 5

= 44 m2.

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