Question

a car travelling as a speed of 40 km per hour can complete a journey in in 9 hour how long will it take to travel the same distance and 60 kilometre per hour​

Answer 1

Answer :–

• Time taken to completethe journey = 6 hours.

Given :–

• First speed = 40 km/h.
• Time = 9 hour.
• Second speed = 60 km/h.

To Find :–

• Time taken to complete the journey.

Solution :–

First, we need to find the distance travelled by a car.

We know that,

$\green{ \boxed{ \blue{distance = speed \times time}}}$

We have,

• Speed = 40 km/h.
• Time = 9 hour.

$\longrightarrow40\:\dfrac{km}{ \cancel{hr}} \times 9 \: \cancel{hr}$

$\longrightarrow40 \: km \times 9$

$\longrightarrow40 \times 9 \: km$

$\longrightarrow360 \: km$

Now we have,

• The distance travelled by car = 360 km.
• Speed = 60 km/h.

Time taken to complete the journey = $\sf \dfrac{Distance travelled}{Speed}$

$\longrightarrow \dfrac{36 \cancel0 \: \cancel{km}}{6 \cancel0 \cancel{km} /h}$

$\longrightarrow \dfrac{36}{6} h$

$\longrightarrow \dfrac{6}{1} h$

$\longrightarrow 6 \: h$

Hence,

Time taken to complete the journey is 6 hours.