If Rohan drives car at 48 km/hr he arrives Delhi at 3:00 PM . If he dr
| If Rohan drives car at 48 km/hr he arrives Delhi at 3:00 PM . If he drives car at 80 km/hr he will arrive at the same place at 11.00 AM . At what speed must he drive the car to get there at 1:00 PM ?
A. 50 km/hr
B. 55 km/hr
C. 60 km/hr
D. 62 km/hr
Right Answer is: C
SOLUTION
When he travels at the speed of 80 km/hr he reaches at 11:00 AM.
Let when he travels at the speed of x km/hr he reaches at 1:00 PM.
When he travels at the speed of 48 km/hr he reaches at 3:00 PM.
As there is a fixed difference of 2 hours between these times.
NOTE – If Time is in A.P. and Distance is constant in that case Speed will be in H.P.
⇒ 80 , x , 48 will be in H.P.
Required speed (x)= 
km/hr
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