Question

A bird flies north at 20 m/s for 15s. It rests for 5s and then flies south at 25 m/s for 10s the average speed for the whole trip is​

Answer 1

Answer:

183.32m/s

Explanation:

BIRD AT NORTH

speed while flying at north=20m/s

time =15s

distance =t×s=15s×20m/s=300m

BIRD WHILE REST

speed when the bird was in rest =0m/s

time=5s

distance=t×s=5s×0m/s=0m

BIRD AT SOUTH

Speed while flying at South =25m/s

time=10s

distance=s×t=25m/s×10s=250m

now let's solve the question

average speed=total distance/total time

total distance =300m+0m+250m=550m

total time=15s+5s+10s=30s

$= \frac{550}{30} = 183.3333 \: and \: so \: on \: m |s$

so let's round of its 2nd decimal place =183.32m/s