Answer:
The correct answer will be "0.756596 m²".
Step-by-step explanation:
The given values are:
The radius of an umbrella,
r = 0.4 m
The height of an umbrella,
h = 0.45 m
As we know,
The lateral surface of an umbrella will be:
⇒ 
On substituting the values, we get
⇒ 
⇒ 
So that the amount of fabric needed will be "0.756596 m²".
Answer: 27.9 let me know if you need a another answer I hope this helps!
Volume of a cylinder of radius r and heigth h is

Here h is 15 cm and r is 6 cm.
8 is in the tens place. It has a value of 80.