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In a camp 180 students had ration for 20 days. How many students should leave the camp if the ration should last for 25 days? (A) 36 (B) 24 (C)28 (D) 40

A part of monthly hostel charges in a colege are fixed and the remaining depend on the number of days one has taken food in the mess. When a student A takes food for 15 days, he has to pay Rs 1200 as hostel charges whereas a student B, who takes food for 24 days, pays Rs 1560 as hostel charges. Find the fixed charges and the cost of food per day.

The mess charges for 35 students for 24 days is Rs. 6,300. In how many days will the mess charges be Rs. 3,375 for 25 students ? :