A motorist started on a 290 km journey. He started from his house at 10 : 50 a.m. and travelled at an average speed of 80 km/h for 1 % hour. At what speed must he travel for the rest of his journey to reach the destination at 2:20 p.m. ? help me fast quick answer need
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Step-by-step explanation:
Time = Distance/Speed
Time taken in going = 150/50 km/h = 3 km/h
Time taken in returning = 150/30km/h = 5km/h
Total time = ( 3+5 ) h
Total distance = ( 150+150 ) km = 300 km
Average speed = Total Distance/Total time
= 300 km/ 8 h
= 37.5 km/h
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