Question

Find the average speed of a car which covers a distance of 14 km in the first 15 minutes and 10 km in the next 15 minutes.

• A. 50 km per hour
• B. 60 km per hour
• C. 48 km per hour
• D. 20 km per hour

Answer 1

The correct option is C

48 km per hour

Total distance covered = 14 + 10 = 24 km

Total time = 15 + 15 = 30 minutes or $\frac{1}{2}$ hr

Average speed $=\frac{\text{Total distance}}{\text{Total time}}$
$=\frac{24km}{\frac{1}{2}hrs}=48km/hr$