A and B travel from X to Y at the speed of 15 km/hr and 45 km/hr respectively . If B takes \(\frac{1}{3}\) hour lesser time than A , then what is the distance between the X and Y ?
Answer & explanation
Correct answer: option 4
Ratio A : B
15 : 45
Speed 1 : 3
Time 3 : 1
( Distance = Speed × Time , so ratio of speed and time is inverse to each other )
According to question ,
2R = 20 minutes
1R = 10 minutes
3R = 30 minutes
Distance = 15 × \(\frac{30}{60}\) = 7.5 km