On Monday, Mukesh travelled x km at a constant speed of 90 km/h. On Tuesday, he travelled on the same route at a constant speed of 120 km/h. His trip on Tuesday took 16 minutes less than his trip on Monday. Find the value of x

Respuesta :

Answer:

x = 96 km.

Step-by-step explanation:

We have,

Distance traveled by Mukesh = x km.

Speed on Monday = 90 km/h and Speed on Tuesday = 120 km/h.

Let, Time taken on Monday = t hours

Then, Time taken on Tuesday = (t-16/60) hours

Since, we know that, [tex]Speed=\frac{Distance}{Time}[/tex] i.e.  [tex]Distance=Speed\times Time[/tex].

Thus, we have the following relations,

[tex]x=90\times t[/tex] and [tex]x=120\times (t-0.267)[/tex]

Thus, we get,

[tex]90\times t=120\times (t-0.267)[/tex]

i.e. [tex]90\times t=120\times t-32)[/tex]

i.e. [tex]90\times t-120\times t=-32[/tex]

i.e. [tex]-30\times t=-32[/tex]

i.e. t = 1.067 hours.

So, the time taken by Mukesh is 1.067 hours.

Thus, as [tex]x=90\times 1.067[/tex] i.e. x = 96.

Hence, the distance traveled by Mukesh is 96 km.