Places Meerut and Agra are 693 kms. apart. Train A leaves from Meerut for Agra and Train B leaves from Agra for Meerut at the same time on the same day on parallel tracks. Both trains meet after 8 hours 15 minutes. The speed of B is 20 km/h more than that of A. What is the speed (in km/h) of B?
Answer & explanation
Correct answer: option 4
Let, speed of A = x km/h
Speed of B = x + 20 km/h
Both trains are running in opposite directions.
\(\frac{693}{x + x + 20}\) = \(\frac{33}{4}\)
2x + 20 = 21 × 4
2x = 64
x = 32
Speed of B = x + 20 = 32 + 20 = 52 km/h