A covered a distance of 240 km at a certain speed. Had his speed been 8 km/h less, then the time taken would have been one hour more for covering the same distance. How much time (in hours) will he takes to cover a distance of 480 km at his original speed?
A. 11
B. 8
C. 10
D. 9
Answer: Option C
Solution(By Examveda Team)
$$\eqalign{ & {\text{Distance}} = \frac{{{S_1} \times {S_2}}}{{{S_1} - {S_2}}} \times {\text{difference of time}} \cr & {\text{240}} = \frac{{S\left( {S - 8} \right)}}{{S - S + 8}} \times 1 \cr & 240 \times 8 = S \times \left( {S - 8} \right) \cr & 48 \times 40 = S \times \left( {S - 8} \right) \cr & S = 48{\text{ km/hr}}{\text{.}} \cr & {\text{ = }}\frac{{480}}{{48}} = 10{\text{ hrs}} \cr} $$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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