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A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.?
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Solution:
Given, the car covers one-third of the distance at a speed of 20 km/h and the rest of the distance at a speed of 60 km/h.
Let the total distance be D.
Then, the distance covered at 20 km/h = (1/3)D
The distance covered at 60 km/h = (2/3)D
Time taken to cover the distance at 20 km/h = (1/3D) / 20 = (1/60) hours
Time taken to cover the distance at 60 km/h = (2/3D) / 60 = (1/90) hours
Total time taken to cover the distance = (1/60) + (1/90) = (1/36) hours
Average speed = Total distance / Total time taken
= D / (1/36)
= 36D km/h
Therefore, the average speed of the car is 36 km/h.
Hence, the correct option is (c) 36 km/h.
Given, the car covers one-third of the distance at a speed of 20 km/h and the rest of the distance at a speed of 60 km/h.
Let the total distance be D.
Then, the distance covered at 20 km/h = (1/3)D
The distance covered at 60 km/h = (2/3)D
Time taken to cover the distance at 20 km/h = (1/3D) / 20 = (1/60) hours
Time taken to cover the distance at 60 km/h = (2/3D) / 60 = (1/90) hours
Total time taken to cover the distance = (1/60) + (1/90) = (1/36) hours
Average speed = Total distance / Total time taken
= D / (1/36)
= 36D km/h
Therefore, the average speed of the car is 36 km/h.
Hence, the correct option is (c) 36 km/h.
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A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.?
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A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.?.
A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A car is moving on a straight road covers one third of the distance with a speed of 20km/h and the rest with a speed of 60km/h. The average speed of the car is? (a) 40km/h. (b) 50km/h (c) 36 km/h (d) 55km/h Crct ans is opt.C. Explain.?.
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