A = p(1 + rt)
A/p = 1 + rt
rt = A/p - 1
t = (A/p - 1)/r
Answer:

Step-by-step explanation:
The total surface area of a cone is given by :

Put r = 2r and l = 2l in the above formula

Hence, the total surface area of the cone is
.
Your answer will be,
ANSWER: (4b - 5)^2
You're welcome :)
The answer is 0.0017. Do you not have a calculator?