ibm - a car has to cover a distance of 750 km by travelling first 300 km at a speed of 75 kmhr and the remaining at a speed of 90 kmhr find the time taken by the car to cover the full distance - skillgun

Given distance = 750km
Remember that, time = distance/speed
Time taken to cover the first 300 km at the speed of 75km/hr = 300/75 hr
= 4 hours
Time taken to cover the remaining (750 - 300) 450 km at the speed of 90km/hr
= 450 / 90 = 5 hours.
Total time taken to cover 750 km = 4 + 5 = 9 hours.