2019 · Q23
The train fare and bus fare between two stations is in the ratio 3 : 4. If the train fare increases by 20% and bus fare increases by 30%, then what is the ratio between revised train fare and revised bus fare?
Elementary MathematicsRatio and Proportion
- A9/13
- B17/12
- C32/43
- D19/21
Explanation
Let the original fares be 3x (train) and 4x (bus). After the increases they are 3x·1.2 = 3.6x and 4x·1.3 = 5.2x. The revised ratio is 3.6:5.2 = 36:52 = 9:13. The answer is (A) 9/13.