A man drives from Bhopal to Agra without taking rest. It covers first

1.	A man drives from Bhopal to Agra without taking rest. It covers first 150 km at the speed of 75 km/h. What is the car’s average speed for the remaining 130 km. If overall average speed in the entire journey is 70 km/h?1. 62 Km/hr2. 45 Km/hr3. 65 Km/hr4. 35 Km/hr5. 60 Km/hr
Answer» Correct Answer - Option 3 : 65 Km/hr Given: First distance = 150 km First speed = 75 km/h Remaining distance = 130 Overall average speed in entire journey = 70 km Concept used: Average speed = (Total distance)/(Total time) Calculations: Time taken in first 150 km = 150/75 = 2 hr Total distance = 150 + 130 = 280 km So, total time = Distance/Speed ⇒ 280/70 = 4 hrs Time for rest of the journey = 4 – 2 = 2 hrs Average speed for the remaining journey = 130/2 = 65 km/hr ∴ The car’s average speed for the remaining journey is 65 km/h

A man drives from Bhopal to Agra without taking rest. It covers first 150 km at the speed of 75 km/h. What is the car’s average speed for the remaining 130 km. If overall average speed in the entire journey is 70 km/h?1. 62 Km/hr2. 45 Km/hr3. 65 Km/hr4. 35 Km/hr5. 60 Km/hr

Answer» Correct Answer - Option 3 : 65 Km/hr

Given:

First distance = 150 km

First speed = 75 km/h

Remaining distance = 130

Overall average speed in entire journey = 70 km

Concept used:

Average speed = (Total distance)/(Total time)

Calculations:

Time taken in first 150 km = 150/75 = 2 hr

Total distance = 150 + 130 = 280 km

So, total time = Distance/Speed

⇒ 280/70 = 4 hrs

Time for rest of the journey = 4 – 2 = 2 hrs

Average speed for the remaining journey = 130/2 = 65 km/hr

∴ The car’s average speed for the remaining journey is 65 km/h

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