Self Assessme1. A rectangular piece of metal with sides 24 cmand 18 cm

1.	Self Assessme1. A rectangular piece of metal with sides 24 cmand 18 cm costs1080. How much will a squarepiece of the same metal of side 16 cm cost if thecost of metal is proportional to its area(a) 840(c) 720(b)(d)640900
Answer» Area of Reactangular piece= length * breadth= 24 * 18= 432 cm^2 Area of Square piece= sideside= 1616= 256 cm^2 Now, 432 cm^2 cost = 10801 cm^2 cost = 1080/432 = 2.5 Then,256 cm^2 cost = 232*2.5= Rs 640 (b) is correct option

Self Assessme1. A rectangular piece of metal with sides 24 cmand 18 cm costs1080. How much will a squarepiece of the same metal of side 16 cm cost if thecost of metal is proportional to its area(a) 840(c) 720(b)(d)640900

Answer»

Area of Reactangular piece= length * breadth= 24 * 18= 432 cm^2

Area of Square piece= side*side= 16*16= 256 cm^2

Now, 432 cm^2 cost = 10801 cm^2 cost = 1080/432 = 2.5

Then,256 cm^2 cost = 232*2.5= Rs 640

(b) is correct option