The square below represents one whole. Express the shaded area as a fraction, a decimal, and a percent of the whole.
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Rate of interest =  10.95%

Step-by-step explanation:

Given:

Amount deposit in bank = 25,000

Number of year = 60 year - 40 year = 20 year

Future value = 200,000

Find:

Rate of interest

Computation:

A = P[1+r]ⁿ

Future value = Amount deposit in bank[1+Rate of interest]ⁿ

200,000 = 25,000[1+r]²⁰

8 = [1+r]²⁰

1.1095 = 1 + Rate of interest

Rate of interest = 0.1095

Rate of interest =  10.95%