The surface area of a certain plant that requires painting is 8 ,000 sq ft. Two kinds of paint are available whose brand are J and K .Paint J costs P1.40 per sq.ft but needs renewal at the end of...

The surface area of a certain plant that requires painting is 8 ,000 sq ft. Two kinds of paint are available
whose brand are J and K .Paint J costs P1.40 per sq.ft but needs renewal at the end of every 4 years while paint K costs
P1.8 per square ft. If money is worth 16% effective , how often should paint K be renewed so that it will be as
economical as paint J?

A) 5.6.years C) 3.9 years
B) 4.2 years D) 5.3 years