2009 · Q82
A milk vendor bought 28 L of milk at the cost of Rs. 8.50 per litre. After adding some water, he sold the mixture at the same price. If he gains 12.5%, how much water did he add?
Elementary MathematicsAlgebra
- A5.5 L
- B4.5 L
- C3.5 L
- D2.5 L
Explanation
(28+w)·8.5 = 238·1.125 gives w = 3.5 L.