Answer:
51.0feet
Step-by-step explanation:
To get the length of the given diagonal, we will use pythagoras theorem as shown;
First we need to get the diagonal of the base;
d² = 40²+30²
d² = 1600+900
d² = 2500
d = √2500
d = 50ft
The diagonal of the base is 50ft
Get the required diagonal
Let the required diagonal be x
x² = 10²+50²
x² = 100+2500
x² = 2600
x = √2600
x = 50.99feet
Hence the distance of the red line is 51.0feet to the nearest tenth
