Answer:
69.1²feet
Step-by-step explanation:
area = pi x r²
11x2= 22
22x 3.14 = 69.08
69.1
80 minutes or 1 h 20 minutes
15-13=2
2/0.025=80
So we can conclude that it takes 80 minutes till it reaches 13 feet.
Mass of gold bar=13.896