9
Q:
A) 42 sec | B) 44 sec |
C) 46 sec | D) 48 sec |
Answer: D) 48 sec
Explanation:
Explanation:
Relative speed = 60 + 90 = 150 km/hr.
= 150 x 5/18 = 125/3 m/sec.
Distance covered = 1.10 + 0.9 = 2 km = 2000 m.
Required time = 2000 x 3/125 = 48 sec.