Question

plzz solve this question with explation​

Answer 1

Answer:

option d is the answer 20 years

Step-by-step explanation:

they asked for per annum means 1 year

so,

the answer how to calculate

5%×5÷100=0.25

5%×10÷100=0.5

5%×15÷100=0.75

5%×20÷100=1

so 20 years is correct answer.