A square field ABCD of side 90 in is so located that its diagonal AC is from north to south and the corner B is to the west of D. Rohan and Rahul start walking along the sides from B and C respectively in the clockwise and anti-clockwise directions with speeds of 8 km/hr and 10 km/hr. Where shall they cross each other the second time?

A

On AD at a distance of 30 m from A

B

Only BC at a distance of 10 m from B

C

On AD at a distance of 30 m from D

D

ON BC at a distance of 10 m from C