If working efficiency of pipes a and B is in the ratio of 5:2. If the total volume of the water to be filled is 70 litres. Find in how many days pipe A will fill the tank?
Answer & explanation
Correct answer: option 1
A : B
Efficiency → 5 : 2
Time → 2 : 5
Total amount = 2 × 5 = 10
10 → 70
1 → 7
Time taken by A = 7 × 2 = 14 days