12. Preeti is going on her moped at a speed of 24 kmhr. How much time will she take to cover 720 metres?
13. A car, running at 45 km/hr, takes 6. hours to complete a journey. At what speed must it travel to complete the journey in 5 hours?
14. A car covers a certain distance in 40 minutes, if it runs at 54 kmhr. How much time will it take to cover the samne distance at a speed 45 km/hr?
13. A car, running at 45 km/hr, takes 6. hours to complete a journey. At what speed must it travel to complete the journey in 5 hours?
14. A car covers a certain distance in 40 minutes, if it runs at 54 kmhr. How much time will it take to cover the samne distance at a speed 45 km/hr?
Answers & Comments
Verified answer
12.To find out how much time Preeti will take to cover 720 meters at a speed of 24 km/hr, you can use the formula: distance = speed x time.
If you know the distance and the speed, you can rearrange the formula to solve for time:
time = distance / speed = 720 meters / (24 * 1000/3600) = 720/0.067 = 10800 sec (or 3 hours)
13.To find the speed the car needs to travel to complete the journey in 5 hours, you can use the formula: distance = speed x time.
If the distance is constant, you can rearrange the formula to solve for speed: speed = distance / time.
In this case, the distance is constant and the time is 5 hours, so the car needs to travel at a speed of:
distance / 5 hours = distance / 5 = 45km/hr
14.To find the time it will take to cover the same distance at a speed of 45 km/hr, you can use the formula: distance = speed x time.
If you know the distance, you can rearrange the formula to solve for time:
time = distance / speed = distance / 45 km/hr.
If it covers 54 km/hr in 40 minutes, the distance is (54*40)/60 = 36 km.
so, it will take 36/45 = 48 minutes at the speed of 45km/hr.