2025 · Q52
Two persons X and Y leave place P for place Q at 7:00 a.m. and 7:10 a.m. respectively, travelling at 4.8 km/h and 6 km/h. At what distance from P will they meet?
Elementary MathematicsTime, Speed and Distance
- A3 km
- B3.5 km
- C4 km
- D4.5 km
Explanation
X's head start: 4.8*(1/6)=0.8 km. Relative speed 6-4.8=1.2 km/h, so Y catches X after 0.8/1.2=2/3 h, at distance 6*(2/3)=4 km from P. Equivalently, X travels 5/6 h at 4.8 km/h = 4 km.