In a tourist cable car, cabins leave stations at sea level and at the top of a mountain. The crossing takes 1.5 minutes and both cabins move at the same speed. Forty seconds after cabin $A$ departs from the station at sea level, it crosses with cabin $B$, which had left from the top of the mountain.
How many seconds after cabin $B$ departed did cabin $A$ depart?\\
(A) 5\\
(B) 10\\
(C) 15\\
(D) 20\\
(E) 25