Question

Two trains are moving in apposite direction at
the speed of 50km/h and 70km/hr. Their length
are 150 m and 100 m .The time required for
their crossing each other is
(a) 6.5 sec
(b) 7.5 sec
(c) 8.5 sec
(d) None of these​

Answer 1

Answer:

(120×5/18) then divide 250 by (120×5/18)