Question

A car travels 180 km in 45mins.find the speed of the car in km/hr

Answer 1

Given :

Distance travelled by car = 180 km

Time taken = 45 minutes

To find :

The speed of the car in km/hr.

Formula used:

$speed = \frac{distance}{time}$

Solution:

To find speed in km/h , distance and time must be in kilometres and hours respectively.

Distance is given as :- 180 km

And Time taken = 45 minutes

Now we have to change 45 minutes into hours

we know that :-

1 minute = 1/60 hours

∴ 45 min = 45/60 hours

45 min = 45/60 hours

45 min = 3/4 hours

45 min = 0.75 hours

Now to find speed in the put :-

• distance = 180 km
• time = 0.75 hours

$⟹speed = \frac{distance}{time}$

$⟹speed = \frac{180}{0.75}$

$⟹speed = \frac{180 \times 100}{75}$

$⟹speed = \frac{180 \times 20}{15}$

$⟹speed = \frac{36 \times 20}{3}$

$⟹speed = \frac{12 \times 20}{1}$

$⟹speed = {240} \: \frac{km}{h}$

Answer :

240 km/h

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Learn more :-

$⟹time = \frac{distance}{speed}$

$⟹time \times speed = {distance}$

One hour = 60 minutes

One hour = 3600 seconds

One day = 24 hours

One second = 1/3600 hours

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