Question

A bus takes 2 h to cover a distance of 80 km. Calculate its speed in km/h and m/s

Answer 1

Acc. To me

Speed =distance/time

For km/hr

V=d(km)/t(hr)

V=80/2

V=40km/hr

For m/s

V=d(m)/t(sec)

You know 1000m=1km

If you multiply by 80 then

1000*80=1*80

80000m=80km

Means in 80 km there is 80000m

Then d(m)=80000

You know 1hr =60min

1min=60sec

If you multiply 2nd with 60 you found

60min=60*60sec

you see above 60 min 1hr

So 1 hr =60*60 sec

1hr=3600sec thn

T(sec)=3600

So v=d(m)/t(sec)

V=80000/3600

V=22.22 m/sec (approx)

I hope it help