Question 857771
Rahul's traveling time is 15 hours - 1 hour rest, or 14 hours.
Half of that time (7 hours) is traveled at 90 kmh.  So his first half is 90*7, or 630 km.
His second half (7 hours) is traveled at 27kmh.  27*7=189 km.
Add them together to get:
630+189 = 819km