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CBSE Class 9 Answered

The diameter of a garden roller is 1.4 m and it is 2 m long. How much area will it level in 5 revolutions? 
Asked by mkmishra101 | 02 Mar, 2016, 07:13: PM
answered-by-expert Expert Answer
Diameter of the roller = 1.4 m 
Radius = 1.4 ÷ 2 = 0.7 m 
Length of garden = 2 m 
Surface area  = 2 πrl
= 2 ×22 over 7 × 7 over 10 × 2
= 44 over 5 m squared
 
Area levelled in 5 revolutions = 5 × 44 over 5 m squared = 44 m2
 
Answered by Keravi Thanani | 03 Mar, 2016, 11:30: AM

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