How many seconds will a boy take to run one complete round around a square field of side 78 metres, if he runs at a speed of 13 km/h?
86.4
To find the time taken, first calculate the perimeter of the square: - Perimeter = 4 × 78 = 312 metres. - Convert the speed into metres per second: 13 km/h = 13 × 1000 / 3600 = 13/3 m/s. - Time = Distance / Speed = 312 / (13/3) = 312 × 3 / 13 = 86.4 seconds.
Important Questions from Speed Time and Distance
A journey of 900 km is completed in 11 h. If two-fifth of the journey is completed at the speed of 60 km/h, at what speed (in km/h) is the remaining journey completed?
A car starts from point A towards point B, travelling at the speed of 20 km/h. 1 \(\frac{1}{2}\) hours later, another car starts from point A and travelling at the speed of 30 km/h and reaches 2 \(\frac{1}{2}\) hours before the first car. Find the distance between A and B.
A bus covered a distance of 162 km. If speed of this bus is 15 m/s, then what will be the time taken ?
An athlete runs an 800 m race in 96 seconds. His speed (in km / h) is:
A person has to cover a distance of 150 km in 15 hours. If he traveled with the speed of 11.8 km/hr for 10 hours. At what speed he has to travel to cover the remaining distance in the remaining time?
