Chandu covers certain distance by bus at a speed of 30km/h, then he return with the speed of 5 km/h by foot. Total time taken by him in whole journey is 4hours and 30minutes. Then find the distance covered by the bus?

Let distance = d km. Time by bus = d/30 hours, time walking = d/5 hours. Total time = 4.5 hours. So d/30 + d/5 = 4.5. Converting: d/30 + 6d/30 = 7d/30 = 4.5. Therefore d = (4.5 x 30)/7 = 135/7 = 19.286 km. Option B (19.28 km) is approximately correct - there's a minor rounding difference between 19.286 and 19.28, but B is clearly the intended answer. The other options don't match the calculation.