**A plastic box 1.5 m long, 1.25 m wide and 65 cm deep is to be made. It is opened at the top. Ignoring the thickness of the plastic sheet, determine:****(i) The area of the sheet required for making the box.****(ii) The cost of sheet for it, if a sheet measuring 1 costs Rs 20.**

**Solution (i)**

Length of open plastic box **m**

Breadth of open plastic box **m**

Height of open plastic box **cm ** **m**

The area of the sheet required for making the open plastic box ** **

** (Because it is open from the top)**

**Solution (ii)**

1 of sheet costs Rs 20

5.45 of sheet would cost **Rs **