A car covers a total distance of 240 km. It travels the first half of the distance at 40 km/h and the second half at 60 km/h. Find the average speed for the full journey. MCQ with Answer and Explanation
A car covers a total distance of 240 km. It travels the first half of the distance at 40 km/h and the second half at 60 km/h. Find the average speed for the full journey.
Two trains 120 meters and 130 meters long are running in opposite directions at speeds of 45 km/h and 45 km/h respectively. In what time will they cross each other?
A sound wave travels at a speed of 330 m/s. If the echo of a sound is heard from a wall after 2 seconds, find the distance of the wall from the source.
Explanation:
Total distance traveled by the sound wave to the wall and back = Speed * Time = 330 * 2 = 660 meters. Distance to the wall = 660 / 2 = 330 meters.
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