state gov MP Forest Guard and Jail Prahari Mock Test 2023 Quantitative Aptitude Time and Work Work Efficiency
A man can plough a field alone in 20 days. His wife can plough it in 25 days. When, they plough the field with their son they can plough it in 5 days. How many days would the son take if he were to plough the field alone?
1
\(8 \dfrac{1}{11}\)
2
\(9 \dfrac{1}{11}\)
3
\(10 \dfrac{1}{11}\)
4
\(11\dfrac{1}{11}\)