Question

A car covers the first 30 km at a speed of 60 kmph and the next 20 km at 80 kmph. find the averag speed

Answer 1

Answer:

D1=30km

D2=20KM

T1=D1/S1=30/60=1/2

T2=20/80=1/4

AVG SPEED= TOTAL DISTANCE TRAVELED/ TOTAL TIME TAKEN

=30+20/(1/2+1/4)

=200/3 KMPH

THANK YOU. HOPE IT HELPS YOU!

Answer 2

Answer:

66.67

Explanation:

We all know average speed = Distance Travel/Time Taken.

Total distance travel,(1st 30 km 2nd 20 km.) 50.

We got total distance travel.

Now we entail to find the Time taken

Time taken=Distance/Speed.

30/60=0.50 and 20/80=0.25

Total time taken 0.50+0.25=0.75

Now we put the average speed formula

50/0.75=66.6666667(66.67)

Thank You