Equal distances at different speeds: average speed, a missing speed or the distance
This type of question, asked 5 times: CDS 2 2016, CDS 2 2017, CDS 1 2018, CDS 1 2022, CDS 2 2026. All 5 questions below, oldest first.
Try each one first, then open its answer.
Question 1
CDS 2 2016
99A motorist travels to a place 150 km away at an average speed of 50 km/hour and returns at 30 km/hour. What is the average speed for the whole journey ?Tap an option to check your answer.
Question 2
CDS 2 2017
40A boy went to his school at a speed of 12 km/hr and returned to his house at a speed of 8 km/hr. If he has taken 50 minutes for the whole journey, what was the total distance walked ?Tap an option to check your answer.
Question 3
CDS 1 2018
48A car has an average speed of 60 km per hour while going from Delhi to Agra and has an average speed of km per hour while returning to Delhi from Agra (by travelling the same distance). If the average speed of the car for the whole journey is 48 km per hour, then what is the value of ?Tap an option to check your answer.
Question 4
CDS 1 2022
19A car travels from to at a speed of 40 km/hr, travels back from to at a speed of 30 km/hr and again goes from to at a speed of 60 km/hr. What is the average speed of the car?Tap an option to check your answer.
Question 5
CDS 2 2026
94A cyclist pedals from her house to her office at a speed of 3 kmph and back from the office to her house at 6 kmph. What is the average speed ?Tap an option to check your answer.