Question

8. Two points, L and N, are 160 m apart. M lies on
the straight line joining L and N. An object travels
from L to M at an average speed of 10 m/s in
6 seconds and then from M to N at an average
speed of 25 m/s. Find the average speed of the
object for its entire journey from L to N.
9. A car travels the first 50 km of its journey at
an average speed of 25 m/s and the next 120 km at
an average speed of 80 km/h. The car completes the
last part of its journey at an average speed of
90 km/h in 35 minutes. Find the average speed
for its entire journey, giving your answer in km/h.
10. The diameter of a wheel of a car is 60 cm. If the car
travels at an average speed of 13.2 m/s, find the
number of revolutions made by the wheel
per hour, giving your answer correct to the nearest
whole number. (Take a to be 3.142.)​

Answer 1

Answer:

average speed will be the sum of the 2 average speeds and divide by 2

Step-by-step explanation:the first on will be 10+25/2 which is 35/2=17.5