Question

solve fast please please please help​

Answer 1

Answer:

1st answer is 3secs for one oscillation

2nd answer is 7.2 km/hr

Explanation:

1 st question

time period = total oscillation/total time

= 24/8

= 3

2nd question

avg speed = total distance / total time

total time = 30 + 20 mins = 50 mins = 50/60 hr

avg speed =

$\frac{3 + 3}{ \frac{50}{60} }$

$6 \times \frac{60}{50}$

360/50

7.2 km/hr

HOPE YOU'LL UNDERSTAND ^_^