Please help with this math question?

Question

Peter has been asked to put a math of 1 meter wide around a rectangular lawn, which is 22 meters long and 14 meters wide. If the depth of the concrete is to be 10 cm, what volume of concrete does Vince need to order?

Answer 1

The rectangular lawn contains 1 meter wide.

Length(l) = 22 meters

Width(w) = 14 meters

Depth = 10 cm = 0.1 meter.

Volume of concrete along the length,

V1= 2(length * width * depth)

    = 2(22 * 1 * 0.1)

     = 4.4 m³.

Volume of concrete along the width

V2= 2(width * width * depth)

   = 2(14 * 1 * 0.1)

   = 2.8 m³.

Volume of concrete, V= V1+V2

                               = 4.4 + 2.8

                               = 7.2 m³.

Volume of concrete is 7.2 m³.