Answer:
13%
Explanation:
The accounting rate of return (ARR) of an investment project is the accounting profit (usually before interest and tax) expressed as a percentage of the capital invested.The essential feature of ARR is that it is based on accounting profits, and the accounting value of assets employed.
Annual Net income per year=20,000
Capital employed= (Initial cost of machinery+residual value)/2
Capital employed=(280,000+30,000)/2=155,000
Project A Accounting rate of return=Annual net income per year/Capital employed
Project A Accounting rate of return=20,000/155000
=13%