Question

find the total surface area of a cuboid whose length breadth and height are respectively 7 cm 5 cm and 3 cm​

Answer 1

Total Surface Area of Cuboid :- 2( lb + bh + lh )sq.unit

Given :

Length l = 7cm

Breadth b = 5cm

Height h = 3cm

Apply Formula :-

2 ( 7×5 + 5×3 + 3×7 )

2 ( 35 + 15 + 21 )

( 2 × 71 )

142 cm²