a) 10 days
b) 12 days
c) 14 days
d) 15 days
Answer: b
Explanation:
$$\eqalign{
& {\text{Amit’s 1 day’s work }} \cr
& = \left( {\frac{1}{4} – \frac{1}{6}} \right) \cr
& = \frac{1}{{12}} \cr} $$
Amit alone can plough the field in 12 days.
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