Question

A train P starts from Meerut at 4 p.m. and reaches Ghaziabad at 5 p.m., while another train Q starts from Ghaziabad at 4 p.m. and reaches Meerut at 5:30 pm. At what time will the two trains cross each other?

• A. 4:42 p.m.
• B. 4:48 p.m.
• C. 4:50 p.m.
• D. 4:36 p.m.

Answer 1

Answer:

D. 4:36 p.m.

Distance is same taken as "D" time taken for Train P =1 hrs time taken for Train Q = 1.5 hrs speed = distance /time speed of P= D/1=D speed of Q = D/1.5=2D/3 Let t be the time (in hours) after 4:00 p.m. when they cross each other. Distance covered by Train P in t hours = D x t Distance covered by Train Q in t hours = 2D/3 x t Since both trains start at the same time, they meet when their combined distance equals D: D x t+ {2D/3} x t = D t+(2t/3)=1 t=3/5 hrs= 36 min