Find the surface area of a 10 cm × 4 cm × 3 cm brick.  Choose the correct choice from the following:  A) 84 sq. cm  B) 124 sq. cm  C) 164 sq. cm  D) 180 sq. cm  E) None of these
Solution   Surface area = [2(10 × 4 + 4 × 3 + 10 × 3)] cm2 = (2 × 82)cm2 = 164 cm2   Answer 164 sq. cm
<result>C</result>
Find the surface area of a 10 cm × 4 cm × 3 cm brick.