If in February (28 days), the tank capacity was increased by

M: +1.00/-0.00

Read the following passage carefully and answer the given questions
There is an apartment with 60 flats, the water supply (24 hours) to the apartment is provided from the nearby reservoir which has a capacity of 60000 litres. The reservoir gets only filled when it becomes fully empty.
In November: 50% of flats were occupied and each flat uses 25 litres/hr. If the tank was empty at the starting of the month, then the reservoir should be filled (A) times in the end of November.
In December: 75% of the flats were occupied and after every 100 hrs the reservoir tank is filled. Then rate of tank filled per hour in November is (B)percentage more than the rate of tank filled per hour in December.
In January: Each flat consumed same amount of litres per hour as in December and takes 125 hrs to empty a completely filled reservoir, then in January, (C) flats were occupied.

Note: The vacant flats never use any quantity of water.

If in February (28 days), the tank capacity was increased by 20% but the tank was filled upto 80% of its new capacity, then what percent of total flats was occupied, if the reservoir tank was re-filled 7 times in the month & per hour water consumption of water per flat was 24 ltrs.

[IBPS PO main NOV 2018 G]

A 41.5%

B 77.5%

C 28.5%

D 62.5%

E 57.5%