Question

A car takes 2 hours to reach a destination by travelling at 60

km /hr. How long will it take while travelling at 80 km/hr.​

Answer 1

Answer:

Answer

Let the car takes x hours to reach a destination by travelling at the speed of 80 km/h. Then,

Speed (in km/hr) 60 80

Time (in hours) 2 x

Clearly, more the speed, less will be the time taken. So, it is a case of inverse proportion.

∴60×2=80×x⇒x=

80

60×2

=

2

3

Hence, the time taken will be 1

2

1

hours.

Answer 2

Let the car takes x hours to reach a destination by travelling at the speed of 80 km/h. Then,

Speed (in km/hr) 60 80

Time (in hours) 2 x

Clearly, more the speed, less will be the time taken. So, it is a case of inverse proportion.

∴60×2=80×x⇒x=

80

60×2

=

2

3

Hence, the time taken will be 1

2

1

hours.