question_answer

A car takes 2 hours to reach a destination by travelling at the speed of 60 km/h. How long will it take when the car travels at the speed of 80 km/h?

Answer:

Let car takes x hours.

Time (in hours)	2	x
Speed (in km/h)	60	80

If the speed of car increases, then the time taken to reach a destination will decrease. Hence, it is a case of inverse proportion.

So,

\[x\times 80=2\times 60\]

\[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,x=\frac{2\times 60}{80}=\frac{3}{2}\]

\[=1\frac{1}{2}\]

Thus A car takes

\[=1\frac{1}{2}\]

hours to reach the destination.