A car has to cover a distance of 750 km by travelling first 300 km at a speed of 75 km/hr and the remaining at a speed of 90 km/hr. Find the time taken by the car to cover the full distance.
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.
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