Answer:
19.1 ft
Step-by-step explanation:
-This a Pythagorean theorem problem given by the function:
Where
H is the Hypotenuse length
h is the perpendicular height
b is the base length.
#Given that H=20 ft and base length,b =6 ft, the perpendicular height is calculated as:
Hence, the ladder reaches the wall at a height of 19.1 ft
50 km per hour
Average speed = Distance travelled / Time taken
= 200 / 4
= 50
Therefore, average speed is 50 km per hour.