Mensuration Practice Test 3

Question : 2 of 40

Marks: +1, -0

The diameter of a garden roller is 1.4 m and it is 2 m long. The area covered by the roller in 5 revolutions is:

Solution:

Diameter of the garden roller = 1.4 m.
Radius =

7/{10}

m
Length = 2 m.
Area = 2π rh
=

2×{22}/7 × 7/{10}

× 2 =

{88}/{10}

8.8 m^2

Area covered by roller in 5 revolutions = 8.8 × 5 = 44

m^2

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