The pumps can fill water in 20 tanks in 2 hrs in 1 day. How many tanks can be…

Step 1: Find the pumps' combined hourly rate. They fill 20 tanks in 2 hours, so rate = 20 ÷ 2 = 10 tanks per hour.

Step 2: Find total working time over 2 days. 2 days × 4 hours/day = 8 hours.

Step 3: Multiply rate by total time. Tanks filled = 10 tanks/hour × 8 hours = 80 tanks.

Conclusion: The correct number of tanks filled in 2 days (working 4 hours each day) is 80 tanks.

Note: The provided answer choices (7, 3, 5, 2) do not include 80. The option labeled with the value 5 is therefore not correct according to this calculation.