(A) 2 1/2 hour
(B) 4 1/2 hour
(C) 6 1/2 hour
(D) 7 1/2 hour
Correct Option is: B
Distance covered in 1st 2 hrs = (210*2)km
=420km
Distance covered in next 2 hrs = (240*2)km
=480km
Remaining distance = 1035 – (420+480)
=1035 – 900
=135km
Speed in 5th hr = 270 km/hr
Time taken to cover 135 km = 135/270 = ½ hr
Total time taken = (2+2+1/2)
=4 ½ hrs