A) 120km
B) 100km
C) 140km
D) 150km
Correct Answer: C
Solution :
Let distance travelled at 100 km/hr be 'x' km. \[\therefore \] Distance travelled at 50 km/hr is \[(170-x)km\]. Total time taken to cover 170 km is 2 hrs. \[\therefore \,\frac{x}{100}+\frac{170-x}{50}=2\] \[\Rightarrow \,\,x+340-2x=200\] \[\Rightarrow \,\,\]x = 140 km \[\therefore \] Distance travelled at 100 km/hr is 140km.You need to login to perform this action.
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