13. A car covers 48 km more than the distance covered by a bus in the same tim (T hours). The speed of the car is 15 km/h more than the speed of the bus, Ha the speed of bus been 80km/h, what would have been the distance covered by in T hours ? 1) 256 km 2) 288 km 3) 224 km 4) 272 km 5) 240 km
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Let the each half of the running time be t.
During first half time, speed of car is 80 km/h
Distance covered d1=80t km
During second half time, speed of car is 40 km/h
Distance covered d2=40t km
Total distance covered d=d1+d2=80t+40t=120t
Total time taken T=2t
Average speed vavg=Td=2t120t=60 km/hr
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