A person wishes to reach his destination 90 km away 3 hours but for the first half of the journey his speed was 20 km/hr. His average speed for the rest of the journey should be :
A. 4 km/hr
B. 0.75 km/min
C. 1 km/min
D. None of these
Answer: Option C
Solution(By Examveda Team)
Time taken to travel 45 km :$$\eqalign{ & = \left( {\frac{{45}}{{20}}} \right){\text{ hrs}} \cr & = \frac{9}{4}{\text{ hrs}} \cr & = 2\frac{1}{4}{\text{ hrs}} \cr & = 2{\text{ hrs }}15\min \cr} $$
Remaining time = (3 hrs - 2 hrs 15 min) = 45 min
Hence, required speed :
$$\eqalign{ & = \left( {\frac{{45}}{{45}}} \right){\text{ km/min}} \cr & = 1{\text{ km/min}} \cr} $$
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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