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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.

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L=1.5m, B=1.25m, H=65cm=0.65m (i) area of sheet required=area of base+area of four sides =L×B+2(L×H+B×H) =1.5×1.25+2(1.5×0.65+1.25×0.65) =1.875+2(0.975+0.8125) =1.875+2(1.7875) =1.875+3.575 (ii) Cost of sheet per m2 area = area of sheet required×cost...
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L=1.5m, B=1.25m, H=65cm=0.65m

(i) area of sheet required=area of base+area of four sides

=L×B+2(L×H+B×H)

=1.5×1.25+2(1.5×0.65+1.25×0.65)

=1.875+2(0.975+0.8125)

=1.875+2(1.7875)

=1.875+3.575

(ii) Cost of sheet per m2 area =

area of sheet required×cost of sheet

=5.45×20

=Rs. 109

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ANS OF PART 1 According to question L= 1.5 Mt, W=1.25 Mt D= 0.65 Mt Total surface area without top = 2* D* (W+L)+ L* W = 2*0.65*(1.5+1.25)+1.5*1.25 SQ. MT. =1.3*2.75+1.875 SQ.MT. =3.575+1.875 SQ.MT. =5.45 SQ.MT. ANS of part 2 Sheet rate per sq Mt is Rs. 20 Then total cost of sheet = 5.45 *...
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ANS OF PART 1

According to question

L= 1.5 Mt, W=1.25 Mt D= 0.65 Mt

Total surface area without top = 2* D* (W+L)+ L* W

= 2*0.65*(1.5+1.25)+1.5*1.25 SQ. MT.

=1.3*2.75+1.875 SQ.MT.

=3.575+1.875 SQ.MT.

=5.45 SQ.MT.

ANS of part 2

Sheet rate per sq Mt is Rs. 20

Then total cost of sheet = 5.45 * 20

= Rs. 109

 

 

 

 

 

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