Question

a car travel 20km in first hour of its journey 30km in second hour and 40km in third hour calculate its average speed
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Answer 1

${\large{\bf{\red{\clubs{\underline{Given :}}}}}}$

A car travel 20km in first hour of its journey 30km in second hour and 40km in third hour.

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${\large{\bf{\blue{\clubs{\underline{To Find:}}}}}}$

Find its average speed.

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${\large{\bf{\orange{\clubs{\underline{Solution :}}}}}}$

Formula for average speed :

${\blue{\bigstar{\pink{\boxed{\mathfrak{= \frac{Total \: distance \: covered}{Total \: time \: taken} }}}}}}$

${\bf{\purple{Total \: distance \: = 20 + 30 + 40 = 90km}}}$

${\bf{\purple{Total \: time = 3 hrs }}}$

${\sf{\green{= \frac{90}{3} }}}$

${\sf{\green{= {\cancel\frac{90}{3} }}}}$

${\blue{\underbrace{\red{\boxed{\bf{= 30km/h}}}}}}</p><p>$

So,

The average speed of the car is 30km/h.

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${\bf{\fcolorbox{green}{red}{{{XitzNobitaxX}}}}}$