A concrete retaining wall of 10m long, 5m high, and 200mm thick is to be painted with latex paint. 7. Determine the lateral area to be painted. 8. How much is the total cost if the painting cost is Php 400 per sqm If three rectangular holes of 1.5m x 0.3m x 200mm are placed on the wall 9. How many cubic meters of concrete needed to build the wall? 10. What is the total volume of the rectangular solid holes?