Answer to Question #137613 in Geometry for maccachin

Question

A concrete retaining wall of 10m long, 5m high, and 200mm thick is to be painted with latex paint.

a.) Determine the lateral area to be painted.

b.) How much is the total cost if the painting cost is Php 400 per sqm.

Answer 1

a) the lateral are to be painted:

2lh + 2lb

length$\implies$ 10m

height⟹5m

base ⟹ 0.2m

∴

2(10m x 5m ) + 2(10m x 0.2m)

=100m² +4m²

⁼104m²

b)the total cost:

if 1m² ⟹ Php 400

then 104m² is

Php 400 x104 = Php 41,600