Railways
R.R.C. (Gorakhpur) Solved Paper Held on 2nd Shift 30-11-2014
question_answer
A car travels for one third of its journey at 25 kmph, another one third at 50 kmph and the remaining part of the journey at 15 kmph. What is its average speed?
A)25 kmph
B)30 kmph
C)35 kmph
D)45 kmph
Correct Answer:
B
Solution :
Average speed of car \[\frac{=25+50+15}{3}\] \[=\frac{90}{3}\] \[=30\,\,kmph\]