Menu div.question,div.steps {font-size: 16px; padding: 10px;line-height: 20px; margin: 20px;} div.question{border: 1px solid #ccc;} div#solution .button{font-size: 20px; margin: 20px; width: 200px; padding: 10px; text-align: center;} div.hint,div.answer,div.steps{display: none;} div.pre_next{font-size: 30px; width:90%; margin:auto;} div.pre_next a.nav_pre{float:left;} div.pre_next a.nav_next{float:right;} div.title div.notes{ font-family:sans-serif, Arial; font-size: 18px; } 3. Figure P1.8 shows a frustum of a cone. Match each of the expressions (a) pi(r_1 + r_2)[h^2 + (r_2 - r_1)^2]^(1/2), (b) 2pi(r_1 + r_2), and (c) pih(r_1^2 + r_1r_2 + r_2^2)//3 with the quantity it describes: (d) the total circumference of the flat circular faces, (e) the volume, or (f) the area of the curved surface. Hint Match the unit Answer (a) to (f) (b) to (d) (c) to (e) Show Steps set the unit of r and h are m (a) π(m +m)[m^2 +(m-m)^2]^(1/2) => m times sqrt(m^2) => m times m =>m^2 the result unit is m^2 match (f) the unit of area is m^2 (b) 2π(m +m) =>m the result unit is m match (d) the unit of circumference is m (c) πm(m^2 +mm + m^2)//3 => m(m^2) =>m^3 the result unit is m^3 match (c) the unit of volume is m^3