   Chapter 1, Problem 5RCYU

Chapter
Section
Textbook Problem

A particular paint has a density of 0.914 g/cm3. You need to cover a wall that is 7.6 m long and 2.74 m high with a paint layer 0.13 mm thick. What volume of paint (in liters) is required? What is the mass (in grams) of the paint layer?

Interpretation Introduction

Interpretation:

The volume and mass of paint has to be given.

Concept introduction:

Density:

Density can be defined as property that links mass of an object to its volume.  It derived quantity and its unit is gml-1 for liquids and gcm-3 for solid.  The density of material can be calculated with the help of formula,

Density=Mass(g)Volume(mlorcm3)

Explanation

Given: density = 0.914 g/cm3; long = 7.6 m ; hieght = 2.74 m ; thickness = 0.13 mm.volume of paint = (thickness of paint layer) ×(area of wall)Calculate the area of wall:_Area   =  l×b= (7.6 m)(2.74 m)  = 20.824 m2Calculate the volume of paint:_volume of paint  =  (thickness of paint layer) ×(area of wall)Volume = 0.13 mm×20.824 m2 = 0

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