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Vera received a gift box that measured 14 cm by 12 cm by 10 cm.What is the surface area of the box?


Please help

Sagot :

Surface Area of Rectangular box (Prism) = 2 (lw + wh + lh)

Let l = 14 cm
     w = 12 cm
     h = 10 cm

Surface area = 2 (14 cm×12 cm + 12 cm×10 cm + 14 cm×10 cm)
                   = 2 ( 168 cm² + 120 cm² + 140 cm²)
                   = 2 ( 428 cm²)
                   = 856 cm²  , surface area of the box