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    				| 1. | Rakesh can do a piece of work in 20 days. How much work can he do in 4 days? | 
| Answer» The given details are, Time taken by Rakesh to do a piece of work is 20 days Work done by Rakesh in 1 day = 1/20 Work done by Rakesh in 4 days = 4 × 1/20 = 1/5 ∴ 1/5th work can be done by Rakesh in 4days. | |