rectangular prism has length of 15cm wdth of 5cm and height of 3 cm what the surface area

Question

surface area

 

Answer 1

Calculate the surface area of a rectangular prism by using formula : SA = 2(lw + wh + hl), where l = length, w = width and h = height. 

Substitute the values of l = 15, w = 5 and h = 3 in the above formula.

SA= 2(15*5 + 5*3 + 3*15)

    = 2(75+15+45)

    = 2(135)

    = 270 square cm.