Question

The length, breadth and height of a closed box are respectively 2m, 1.5m and 0.8m. Find the total area of canvas required to cover it-up. Find also the cost of canvas if 1sq m of canvas costs Rs. 30.

A rectangular box without lid is to be made by thin sheet of metal. Find the area of the sheet required if the box is 8m long, 4m wide and 2m deep.

Help me!

Answer 1

surface area = 2(2)(1.5) + 2(2)(.8) + 2(1.5)(.8)
= 11.6 m^2
@ 30 per m^2
cost = 30(11.6) = 348

#2
SA = 1(8)(4) + 2(8)(2) + 2(4)(2)
= ...