Question

please solve this question​

Answer 1

Step-by-step explanation:

L=110cm

B=85

H=25

thickness =5cm

internal dimension of bookshelf

=L=(110-5-5)=100

B=(85-5-5)=75

H=(25-5)=20

external surface area of bookshelf LB+2(BH+HL)

110+2(85*25 +25*110)

=19100cm square

surface area of the boarder

(4*75*5+110*5*2)

1500+1100

2600 CM square

total surface area to be polished

=19100+260=21700 cm square

cost of polishing outer surface

=21700*20/100

= Rs4340.

ans

Answer 2

Answer:

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