Question

a rickshaw puller travels a distance of 100m with 10m/s and another 200m with speed of 15m/s. what is the average speed of rickshaw puller​

Answer 1

Answer:

12.8 m/sec is the correct answer

Explanation:

avg speed = total distance traveled

------------------------------------

total time taken

Answer 2

Answer:

$\frac{90}{7}$ $m/s$

Explanation:

Distance Travelled$(D_{1})$ = $100$ $m$

Distance Travelled$(D_2)$ = $200$ $m$

Speed$(S_1)$ = $10 m/s$

Speed$(S_2)$ = $15m/s$

Average Speed = Total Distance / Total Time

Time$(T_1)$ = $\frac{D_1}{S_2}$

Time$(T_2)$ = $\frac{D_2}{S_2}$

⇒Average Speed = $\frac{D_1 + D_2}{T_1 + T_2}$

⇒$\frac{D_1+D_2}{\frac{D_1}{S_1}+\frac{D_2}{S_2}}$

⇒$\frac{300}{10+\frac{40}{3} }$

⇒$\frac{300*3}{70}$

⇒$\frac{90}{7}$ $m/s$