Question

an airplane travels 3,100 km at a speed of 790 km / h for the next 2,800 km. What was the total time of the trip? What was the average speed of the plane for this trip?

Answer 1

Answer:

we know= s=d/t.

let, D1=3100, S=790

then T1=3100/790=3.92

again T2=2800,S=790

T2=2800/790=3.54

Total time=T1+T2=7.46

average speed of the plane=(3100+2800)/7.46=790 km/hr