Question

A car travelling at a speed of 54km/h can cover a distance in 2.5 hrs. It can cover the same distance at a speed of 45km/h:

Answer 1

S=D/T
54=X/2.5
X=54*2.5
   =135KM

S=D/T
45=135/T
T=135/45
  =3 HOURS

Answer 2

Given ,Speed =54km/hr

Time =2.5 hours.

Speed × Time = Distance .

Distance =54×2.5=135 km .

In Next Case ,Distance =135 km

Speed =45 km/h.

Now time = Distance / Speed =135/45=3 hours.

It can cover the same distance at a speed of 45km/h in 3 hours.