Question

A car Travels 135 km at a speed of 45 km/hour and 250 km at a speed of 50 km/hour find its average speed?

Answer 1

135+250÷135÷45+250÷50

385÷3+5

385÷8

48.125

Answer 2

Answer:

average speed =  48.125 km/Hr

Step-by-step explanation:

Car Travels 135 km at a speed of 45 km/hour

Distance = Speed × Time

Time = $\frac {Distance}{speed}$

Time 1 = $\frac {135}{45}$

Time 1 = 3 Hr

Time 2 = $\frac {250}{50}$

Time 2 = 5 Hr

Total Distance = 135 + 250 = 385 km/Hr

Total Time = 3 + 5 = 8 Hrs

Average Speed = $\frac {Total Distance}{Total Time}$

= $\frac {385}{8}$

= 48.125 km/Hr

average speed =  48.125 km/Hr