Ishaan has to reach Kolkata which is 737 km away in 21 hours. His starting speed for 7 hours was 49 km/hr. For the next 184 km his speed was 46 km/hr. By what speed must he travel now so as to reach Kolkata in the decided time of 21 hours?
21 km/hr
The distance covered in 7 hours = 49 × 7 = 343 km. The distance covered in the next 184 km is fixed. The remaining distance = 737 - (343 + 184) = 210 km. Time remaining = 21 - 7 - (184 / 46) = 21 - 7 - 4 = 10 hours. Speed required = 210 / 10 = 21 km/hr.
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?
