Question

A CAR TRAVVELED 20KM IN FIRST HOUR ,AND 30 KM IN SECOND HOUR AND 10 KM IN THIRD HOUR .FIND THE AVERAGE SPEED OF THE CAR

Answer 1

Answer:

I think you are of 9th std

Explanation:

average speed = total distance

-------------------

total time

Therefore,

60 is the right answer

Answer 2

Explanation:

Speed in Ist hour = 20 km/hr, Distance travelled during 1st hr = 1 × 20 = 20 km Speed in IInd hour = 40 km/hr, Distance travelled during 2nd hr = 1 × 40 = 40 km Speed in IIIrd hour = 30 km/hr, Distance travelled during 3rd hr = 1 × 30 = 30km

Average speed=Total distance traveled

total time taken

20+40+30=90

3 3

20+40+30

1+1+1

ans = 30km/hr.