Answer:
William's fastest speed is 7.5 km/h
Step-by-step explanation:
Let the fastest speed of William is f therefore from the question's statement the equation will be
f - 6 = 1.5
Here difference between William's fastest speed and typical speed is 1.5 km/h
Now we will add 6 on both sides of the equation
(f - 6) + 6 = 1.5 + 6
f = 7.5 km/h
So the fastest speed is 7.5 km/h
read the step by step
WARNING IM NOT POSTITIVE ITS RIGHT
a:how fast it will reach the ground
b:descending since they are going down
C:subtract a number by 1500
3m I believe I'm not fully sure