EXERCISE. 12.1
A plastic box 1.5 m long, 125 m wide and 65 cm deep is to be made. It is to be open at
the top. Ignoring the thickness of the plastic sheet, determine
Answers
Answer:
i) The area of the sheet required for making the box is 5.45 meter square.
ii) The cost of sheet is Rs. 113.447.
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Given : 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.
To find :
(i) The area of the sheet required for making the box.
(ii) The cost of sheet for it, if a sheet measuring 7m×3.5m costsर 510.
Solution :
i) The dimension of the box is
Length l= 1.5 m
Breadth b= 1.25 m
Height h= 65 cm = 0.65 m
Area of the sheet required is
A= 2lb + 2bh + 2lh
A= 2(1.5) (1.25) + 2(1.25)(0.65) + (1.5) (0.65)
A= 1.95 + 1.625 + 1.875
A= 5.45m^2
The area of the sheet required for making the box is 5.45 meter square.
ii) The cost of sheet for it, if a sheet measuring 7m×3.5m costsर 510.
i.e, area of sheet 24.5 meter square cost Rs.510
So, 1 meter square cost 510/24.5 = 20.816
Now, The cost of 5.45 meter square cost
20.816 x 5.45= 113.447
Therefore, The cost of sheet is Rs. 113.447.
PLZ MARK AS BRIANLIEST AND THX FOR THE SUPERB QUESTION