Answer:
36 km/h
Explanation:
let it travels 90 km distance with 30 km per hour and same 90 km distance with 45 km/h
so it will take 3 hours to complete 90 km by 30km/h
and 2 hours by 45km/h
now avg. speed = total distance/ total time
90+90/3+2
180/5=36 km/h hope it will be helpful
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Answers & Comments
Answer:
36 km/h
Explanation:
let it travels 90 km distance with 30 km per hour and same 90 km distance with 45 km/h
so it will take 3 hours to complete 90 km by 30km/h
and 2 hours by 45km/h
now avg. speed = total distance/ total time
90+90/3+2
180/5=36 km/h hope it will be helpful