4. Two marks exercise problems I

1. Find the total surface area and the lateral surface area of a cuboid whose dimensions are:

 

length \(=\) \(20 \ cm\), breadth \(=\) \(15 \ cm\) and height \(=\) \(8 \ cm\).

 

Total surface area \(=\)  \(cm^2\)

 

Lateral surface area \(=\)  \(cm^2\)

 

 

2. The dimensions of a cuboidal box are \(6 \ m × 400 \ cm × 1.5 \ m\). Find the cost of painting its entire outer surface at the rate of \(₹22\) per \(m^2\).

 

Cost of painting the cuboidal box \(=\) \(₹\)