Answer: Option
C
Explanation:
Let the speed of Train A be S
_{A} = 45 kmph and that of Train B be S
_{b}
Then, time taken by Train A = T
_{A}
= 4 hrs 48 min = 4 + 
48 
= 
24 
hrs 
60 
5 
Time taken by Train B = T
_{B}
= 3 hrs 20 min = 3 + 
20 
= 
10 
hrs 
60 
3 
Using formula 
S_{A} 
= 

S_{B} 
Note: If two trains (or bodies) start at the same time from points A and B towards each other and after crossing they take a and b sec in reaching B and A respectively, then
(A's spped) : (B's speed) = (
b :
a).
or, S_{B} = 
45 × 6 
= 54 kmph 
5 