By Ajay Kumar

Verified by Ajay Kumar

A man travels from Gurugram to Jaipur, a distance of 240 km, at a speed of 60 km/h. He then takes a break in Jaipur for 1 hour. After the break, he travels from Jaipur to Ajmer, a distance of 130 km, at a speed of 50 km/h. What is his average speed for the entire journey from Gurugram to Ajmer?

  1. 48.68 km/h

  2. 48.00 km/h

  3. 47.67 km/h

  4. 45.52 km/h

Answer: A

Solution

Total distance = \(240+130=370\) km. First journey time = \(\frac{240}{60}=4\) hours. Second journey time = \(\frac{130}{50}=2.6\) hours. Including the break, total time = \(4+1+2.6=7.6\) hours. Average speed = \(\frac{370}{7.6}=48.68\) km/h approximately. Trick: Average speed = total distance divided by total time, including the break.

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