Question

A car civers a distance of 300 km with a speed of 60 km/h and then covers a distance of 450nkm with a speed of 90 km/h. Calculate its average speed.

Answer 1

$\huge\mathfrak{Answer:-}$

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

$\sf 60=\frac{300}{time}$

$\sf time=\frac{300}{60}$

$\sf time=5h$

t1=5hrs .

t2

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

$\sf 90=\frac{450}{time}$

$\sf time=\frac{450}{6</p><p>90}$

$\sf time=5h$

t2 =5hr

$\sf Average \:speed=\frac{total distance}{total time taken}$

$\sf Average\:speed= \frac{300+450}{5+5}$

$\sf Average\:speed=\frac{750}{10}$

$\sf Average \:speed=75kmh{}^{-1}$