A car can finish a certain journey in 10 hours at a speed of 42 kmph. In order to cover the same distance in in 7 hours, the speed of the car (km/h) must be increased by :
A. 12 km/hr
B. 15 km/hr
C. 18 km/hr
D. 24 km/hr
Answer: Option C
Solution(By Examveda Team)
Total distance := 42 × 10
= 420 km
New given time = 7 hr and
Required new speed :
= $$\frac{420}{7}$$ km/hr
= 60 km/hr
∴ Required increase in speed :
= (60 - 42) km/hr
= 18 km/hr
Related Questions on Speed Time and Distance
A. 48 min.
B. 60 min.
C. 42 min.
D. 62 min.
E. 66 min.
A. 262.4 km
B. 260 km
C. 283.33 km
D. 275 km
E. None of these
A. 4 hours
B. 4 hours 30 min.
C. 4 hours 45 min.
D. 5 hours
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