an open base 1.48 m long,1.16 m wide and 8.3 decimetre.find the cost of painted surface of @ 50 $ per centi meter square
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Answer:
Rs.279.70
Step-by-step explanation:
Thickness of wood=3cm
length of open box=1.48m=148cm
breadth of open box=1.16m=116cm
height of open box=8.3dm=83cm
inner length,l=148−(2×3)=142cm
inner breadth,b=116−(2×3)=110cm
inner height, h=83−3=80cm, box is open.
area of inner surface=2(lb+bh+hl)−lb
=2(142×110+110×80+80×142)−[142×110]
=2(15620+8800+11360)(15620)
=71563−−15620
=55940cm
2
=50594m
2
cost of painting inner surface=5.594×50
=Rs.279.70
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