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

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Solution

Unitary method:
At the speed of $60 km / h$ it takes $2 h$ to travel a certain distance.
At the speed of $1 km / h$ , it takes $(60 \times 2) h$
At the speed of $80 km / h$ , it takes $= \frac{(60 \times 2)}{80}$ $= \frac{3}{2} = 1.5 h$
Hence, It takes $1.5 hours$ to reach the destination at $80 km / h$ .

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Q. Question 09.
A car takes 2 hours to reach a destination by travelling at the speed of 60 km/hr. How long will it take when the car travels at the speed of 80 km/hr?

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

Unitary method:At the speed of 60km/h it takes 2h to travel a certain distance.At the speed of 1km/h, it takes (60×2)hAt the speed of 80km/h, it takes =(60×2)80=32=1.5hHence, It takes 1.5hours to reach the destination at 80km/h.

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