8
Q:
A) 7.71 sec | B) 10.48 sec |
C) 9.36 sec | D) 8.45 sec |
Answer: A) 7.71 sec
Explanation:
Explanation:
Given L1 = 140 m
L2 = 160 m
S1 = 60 km/hr
S2 = 80 km/hr
From the question we get,
S1 + S2 = (L1 + L2) / T
=> (60 + 80) 5/18 m/s = 140 + 160/T
=> T = 54/7 = 7.71 sec