A firm takes up economy measures and is able to reduce the operating cost, and raises the operating profit from Rs 50,000 to Rs 60,000. The sales amount to Rs 3,00,000 and the assets are valued at Rs...

A firm takes up economy measures and is able to reduce the operating cost, and raises the operating profit from Rs 50,000 to Rs 60,000. The sales amount to Rs 3,00,000 and the assets are valued at Rs 2,50,000. Find out ROI (a) prior to economy measures, and (b) after the economy measures.