Question : A car covers the first 210 km at a speed of 70 km/h, it covers the next 170 km at a speed of 85 km/h. What is its average speed?
Option 1: 72 km/h
Option 2: 76 km/h
Option 3: 74 km/h
Option 4: 68 km/h
New: SSC CHSL tier 1 answer key 2024 out | SSC CHSL 2024 Notification PDF
Recommended: How to crack SSC CHSL | SSC CHSL exam guide
Don't Miss: Month-wise Current Affairs | Upcoming government exams
Correct Answer: 76 km/h
Solution :
Distance covered in the first case = 210 km
Speed in the first case = 70 km/h
Time taken in the first case = $\frac{210}{70}$ = 3 hr
Distance covered in the second case = 170 km
Speed in the second case = 85 km/h
Time taken in the second case = $\frac{170}{85}$ = 2 hr
Average speed = $\frac{\text{Total distance}}{\text{Total time}}$
= $\frac{210+170}{3+2}$
= $\frac{380}{5}$
= 76 km/h
Hence, the correct answer is 76 km/h.
Related Questions
Know More about
Staff Selection Commission Combined High ...
Result | Eligibility | Application | Admit Card | Answer Key | Preparation Tips | Cutoff
Get Updates Brochure
Your Staff Selection Commission Combined Higher Secondary Level Exam brochure has been successfully mailed to your registered email id “”.
