Question

A cardoard box open from top is 1.5m long,1.25m wide and 65cm deep.find the area of cardboard required for making the box and the cost of cardboard required at Rs.25/sq m

Answer 1

Answer:

Total cost =Rs 136.25

Step-by-step explanation:

Surface are of open cuboid with sides are 'l', 'b' and 'h'

surface area = lb + 2h(l +b)

It is given that dimensions of box are 1.5m long,1.25m wide and 65cm deep.

Therefore l = 1.5 m b= 1.25m h = 0.65m

Surface area = 1.5x1.25 + 2x0.65(1.5 + 1.25)

= 1.875 + 3.575 =5.45

To find the total cost

It is given that, the cost of cardboard required at Rs.25/sq m

Therefore total cost = surface area x cost per meter square

Total cost = 5.45 x 25 =Rs 136.25