RRB NTPC/ASM/CA/TA Exam > RRB NTPC/ASM/CA/TA Questions > A car travels60km/for1.5hours. Then it travel...
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A car travels 60km/ℎ for 1.5 hours. Then it travels 3 hours at 45km/ℎ, after that it covers 55km in 30 minutes, what is the average speed of the car for the entire journey?
- a)28 km/h
- b)86 km/h
- c)56 km/h
- d)70 km/h
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
A car travels60km/for1.5hours. Then it travels 3 hours at45km/, after ...
Given:
Car travel 1.5ℎrs at a speed of = 60km/ℎ
Car travel 3 hrs at a speed of = 45km/ℎ
Car travel 30 minutes to cover the distance = 55km
Average speed = Total distance/Total time
Total distance cover by car in 1.5ℎrs at a speed of 60km/ℎ = (60 +30) = 90km
Total distance cover by car in 3 hrs at a speed of 45km/ℎ = (45× 3) = 135km
Total distance cover by car in 30 minutes = 55km
Total distance covered = (90+135+55)km = 280km
Total time taken = (1.5+3+0.5) hours = 5 hours
Average speed = 280/5 = 56km/ℎ
∴ Average speed for the whole journey is 56km/ℎr.
Car travel 1.5ℎrs at a speed of = 60km/ℎ
Car travel 3 hrs at a speed of = 45km/ℎ
Car travel 30 minutes to cover the distance = 55km
Average speed = Total distance/Total time
Total distance cover by car in 1.5ℎrs at a speed of 60km/ℎ = (60 +30) = 90km
Total distance cover by car in 3 hrs at a speed of 45km/ℎ = (45× 3) = 135km
Total distance cover by car in 30 minutes = 55km
Total distance covered = (90+135+55)km = 280km
Total time taken = (1.5+3+0.5) hours = 5 hours
Average speed = 280/5 = 56km/ℎ
∴ Average speed for the whole journey is 56km/ℎr.
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Community Answer
A car travels60km/for1.5hours. Then it travels 3 hours at45km/, after ...
Calculation of Average Speed:
Step 1: Calculate total distance traveled
- Distance traveled in the first 1.5 hours = 60 km/h * 1.5 hours = 90 km
- Distance traveled in the next 3 hours = 45 km/h * 3 hours = 135 km
- Distance traveled in the last 30 minutes = 55 km
Total distance traveled = 90 km + 135 km + 55 km = 280 km
Step 2: Calculate total time taken
- Total time taken = 1.5 hours + 3 hours + 0.5 hours = 5 hours
Step 3: Calculate average speed
- Average speed = Total distance / Total time taken
- Average speed = 280 km / 5 hours = 56 km/h
Therefore, the average speed of the car for the entire journey is 56 km/h. Hence, option 'C' is the correct answer.
Step 1: Calculate total distance traveled
- Distance traveled in the first 1.5 hours = 60 km/h * 1.5 hours = 90 km
- Distance traveled in the next 3 hours = 45 km/h * 3 hours = 135 km
- Distance traveled in the last 30 minutes = 55 km
Total distance traveled = 90 km + 135 km + 55 km = 280 km
Step 2: Calculate total time taken
- Total time taken = 1.5 hours + 3 hours + 0.5 hours = 5 hours
Step 3: Calculate average speed
- Average speed = Total distance / Total time taken
- Average speed = 280 km / 5 hours = 56 km/h
Therefore, the average speed of the car for the entire journey is 56 km/h. Hence, option 'C' is the correct answer.
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A car travels60km/for1.5hours. Then it travels 3 hours at45km/, after that it covers55km in 30 minutes, what is the average speed of the car for the entire journey?a)28 km/hb)86 km/hc)56 km/hd)70 km/hCorrect answer is option 'C'. Can you explain this answer?
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