2017 · Q26
To maintain 8 cows for 60 days, a milkman has to spend ₹ 6,400. To maintain 5 cows for n days, he has to spend ₹4,800. What is the value of n ?
Elementary MathematicsTime and Work
- A46 days
- B50 days
- C58 days
- D72 days
Explanation
Cost per cow-day = 6400/(8×60) = ₹40/3. For 5 cows over n days: 5×n×(40/3) = 4800, giving n = 4800×3/200 = 72. Hence option (D) 72 days.