railway RRB NTPC Mock Test Series 2024-25 (CBT 1 + CBT 2) Quantitative Aptitude Time and Work Work Efficiency
A, B and C can reap a field in 2 days; B, C and D in 3 days; C, D and A in 7 days; D, A and B in 10 days. In what time can A, B, C and D together reap it?
1
75/14 days
2
66/7 days
3
630/226 days
4
94/3 days