Question

Two stations A and B are 100 km apart on a straight line. One train starts from A at 7 A.M. and travels towards B at 20 km/hr speed, another train starts from B at 8 A.M and travels towards A at 25 km/hr, speed. At what time will they meet?

• A. 10.30 A.M
• B. 11 A.M
• C. 10 A.M
• D. None of these

Answer 1

The correct option is D None of these

(d)
Time from 7 A.M to 8 A.M = 1 hour.
Therefore, time of their meeting

$\left(\frac{d+s_{2}T}{s_1+s_2}\right)hr=\left(\frac{100+25\times 1}{20+25}\right)hr$

= 2 hrs 47 min. after 7 A.M.