A sound wave takes 4 seconds to travel a distance between two structures. If the speed of sound is 340 m/s, what is the distance between the structures in kilometers? MCQ with Answer and Explanation
Question
Report Error
Discuss this Question (0)
Practice More Time Speed and Distance Questions
Question #1
Report Error
A motor car finishes a journey in 10 hours. The first half is covered at 42 km/h and the second half at 48 km/h. Find the total distance of the journey.
Correct Answer: Option B
Explanation:
Let half distance be d. d/42 + d/48 = 10 => (8d + 7d)/336 = 10 => 15d = 3360 => d = 224 km. Total distance = 2d = 448 km.
Let half distance be d. d/42 + d/48 = 10 => (8d + 7d)/336 = 10 => 15d = 3360 => d = 224 km. Total distance = 2d = 448 km.
This question belongs to:
Maths
Time Speed and Distance
Question #2
Report Error
A person covers 20 km at 5 km/h and another 40 km at 10 km/h. Find his average speed for the entire journey.
Correct Answer: Option A
Explanation:
Total distance = 20 + 40 = 60 km. Total time = 20/5 + 40/10 = 4 + 4 = 8 hours. Average speed = 60 / 8 = 7.5 km/h.
Total distance = 20 + 40 = 60 km. Total time = 20/5 + 40/10 = 4 + 4 = 8 hours. Average speed = 60 / 8 = 7.5 km/h.
This question belongs to:
Maths
Time Speed and Distance
Question #3
Report Error
A train 120 meters long passes a pole in 6 seconds. What is the speed of the train in km/h?
Correct Answer: Option C
Explanation:
Speed of train = 120 / 6 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
Speed of train = 120 / 6 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.
This question belongs to:
Maths
Time Speed and Distance
No comments yet. Be the first to start the discussion!