Question

Average supply of water is 1,32,000 L per month. Average supply for first ten days is 2000L per day and 5000L per day for the next 15 days.
What amount of water needs to be supplied in the next five days to maintain the average?
7400
37000
35000
None of these

Answer 1

Answer:

Average supply of water is 1,32,000 L per month. Average supply for first ten days is 2000L per day and 5000L per day for the next 15 days.

$132000 = 10 \times 2000 + 15 \times 5000 + x \times 5 \\ 132000 = 20000 + 75000 + 5x \\ 5x = 37000 \\ x = 7400$