(A) 8 AM
(B) 9 AM
(C) 10 AM
(D) 11 AM
Correct Option is: C
Assume that they meet x hours after 6 AM.
Then, Bus 1, starting from Multan, travels x hours till the bus meet.
Distance travelled by bus 1 in x hours =20x km
bus 2, starting from Lahore , travels (x−1) hours till the bus meet.
Distance travelled by bus 2 in (x−1)hours =30(x−1) km
Total distance travelled
= Distance travelled by bus 1 + Distance travelled by bus 2
⇒170=20x+30(x−1)
170=20x+30x-30
170+30=50x
200=50x
X=4
Hence, the bus meet 4 hours after 6 AM., i.e. at 10 AM.