Question

A car moves a distance of 20 km. It covers
first half of the distance at speed of 100 m/s
and second half at a speed 'V'. If the average
speed of the car is 40 m/s, then the value of
'V' is
100 m/s
200 m/s
50 m/s
25 m/s​

Answer 1

Answer:

Average Speed =Total Speed/Total time

S1=10m/s

S2=x m/s

Average Speed=18m/s

Distance(Total)=100m

Now putting all values in formula we get;

10×x/100=18

X=1800

x=180m