Question

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

Answer 1

1 hr 30 min

Step-by-step explanation:

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Answer 2

$\tt\red{Given:-}$

• A car takes 2 hours to reach a destination by travelling at the speed of 60km/h.

$\tt\red{To \: Find :-}$

• Time required to when the car travels at the speed of 80km/h.

$\tt\red{Analysis :-}$

• Consider the number of hours as a variable.

• Consider the number of hours as a variable.Since, the speed of car and time are in inverse proportion make an equation.

• Consider the number of hours as a variable.Since, the speed of car and time are in inverse proportion make an equation.Finally, get the value of the variable.

$\tt\red{Solution :-}$

• Here the speed of car and time are in inverse proportion.

$\tt\red{According \: to \: the \: question}$

$\tt\dfrac{60}{80} =\dfrac{x}{2}$

By transposing,

$\tt=\dfrac{60 \times 2}{80}$

$\tt x=\dfrac{3}{2} =1\dfrac{1}{2}$

$\tt{ = 80km/h.}$

• Therefore, the car travels 1 1/2 hours at the speed of 80km/h.