Question

for mannish ran at a speed of 6m/sec for 10 sec he ran further 40m at a speed of 8m/sec find his average speed in km/hr

Answer 1

Answer:

$24km/h$

Step-by-step explanation:

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

$v=\frac{s}{t}$

$s=vt$

$s_{1}$ = 6*10

=60m

$t_{1}$=10s

$t_{2} =\frac{s}{v}$

=$\frac{40}{8}$

=5s

$s_{2}$=40m

$Average Speed=\frac{Total Distance travelled}{Total Time taken}$

$v_{Av}=\frac{60+40}{10+5}$

$v_{Av} = \frac{100}{15}$m/s

$v_{Av}=\frac{100}{15}*\frac{18}{5}$km/h

$v_{Av} = 24km/h$