Question

11. Two trains are moving in opposite directions at the speed of 50 and 70 km. per hour. Their lengths an
150 m and 100 m. What is time required for their crossing each other?
(A) 7.5 second
(B) 7.8 second
(C) 8.5 second
(D) 10 second
od of 60 lim nor hour takes 30 seconds to cross a bridge. Wh​

Answer 1

Answer:

10 sec is answer I think abcd