200 bulbs are used 4 hours per day and expenditure of 6 days

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200 bulbs are used 4 hours per day and expenditure of 6 days is Rs. 40. Then how many bulbs should be used 3 hours per day so that expenditure of 15 days is Rs. 48?

[RAS 2016]

A 72

B 800

C 128

D 90