If the cost of using air conditioner is directly proportional to the time for which it is used, inversely proportional to the number of stars given to it and directly proportional to its power in terms of tons. It cost Rs 450 if a 4 star air conditioner of 2 tonnes is used for 20 hrs. Then how much will it cost if a 5 star air conditioner of 1.5 tonnes is used for 10 hours.

If the cost of using air conditioner is directly proportional to the t

1.	If the cost of using air conditioner is directly proportional to the time for which it is used, inversely proportional to the number of stars given to it and directly proportional to its power in terms of tons. It cost Rs 450 if a 4 star air conditioner of 2 tonnes is used for 20 hrs. Then how much will it cost if a 5 star air conditioner of 1.5 tonnes is used for 10 hours.
A.	Rs. 33.75
B.	Rs. 135
C.	Rs. 170
D.	Rs. 165.75
E.	None of these
Answer» C. Rs. 170

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