A tank is 3/8 full. After adding 15 more litres, it becomes 5/8 full. What is the total capacity of the tank?
- A.45
- B.60 ✓
- C.75
- D.90
Explanation: The difference, 5/8 − 3/8 = 1/4 of the tank, equals 15 litres. So the full tank is 15 × 4 = 60 litres.
Class 6 IMO Mathematics Olympiad practice · Arithmetic · Fractions & Decimals
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