2019 · Q10
In a hostel the rent per room is increased by 20%. If number of rooms in the hostel is also increased by 20% and the hostel is always full, then what is the percentage change in the total collection at the cash counter?
Elementary MathematicsPercentages
- A30%
- B40%
- C44%
- D48%
Explanation
Total collection = (rent per room) × (number of rooms). Both rise 20%, so the collection is multiplied by 1.20 × 1.20 = 1.44 — a 44% increase.