Question : A car travels 20% slower than a train. Both start from point A at the same time and reach point B 240 km away at the same time. On the way, the train takes 48 minutes for stopping at the stations. What is the speed (in km/hr) of the car?
Option 1: 80
Option 2: 100
Option 3: 120
Option 4: 60
Correct Answer: 60
Solution :
Let the speed of the train be $V$.
The speed of the car is 20% less than the train = $0.8V$
According to the question,
$\frac{240}{0.8V}-\frac{240}{V}=\frac{48}{60}$ [Use: Time = $\frac{\text{Distance}}{\text{Speed}}$]
⇒ $\frac{300-240}{V}=\frac{48}{60}$
⇒ $\frac{60}{V}=\frac{48}{60}$
⇒ $V$ = 75
Speed of the car is $0.8V$ = 0.8 × 75 = 60 km/hr
Hence, the correct answer is 60.
Related Questions
Know More about
Staff Selection Commission Sub Inspector ...
Result | Eligibility | Application | Selection Process | Cutoff | Admit Card | Preparation Tips
Get Updates Brochure
Your Staff Selection Commission Sub Inspector Exam brochure has been successfully mailed to your registered email id “”.
