SOLUTION:
Number of days required by kamal to finish the work : 14 days
Work done by kamal in one day: 1/14
Vimal can work 40% more efficiently than Kamal.
∴ Vimal one day work = 140% of 1/15 = ( 140/100 × 1/14 ) = 1/10
Vimal alone can complete the work in 10 days.
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