Find the area of the thin sheeting required for making an open cistern (i.e.without a lid), 5 m long, 3 m wide, 4 m deep.?
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area of thin sheeting =lb+2bh+2hl
because one part which area lb is open so we neglect this part .
where l is length , b is width and h is depth of cistern .
now area =5 x 3+ 2 x 3 x 4+ 2 x 4 x 5
=15+24+40=79 m^2
because one part which area lb is open so we neglect this part .
where l is length , b is width and h is depth of cistern .
now area =5 x 3+ 2 x 3 x 4+ 2 x 4 x 5
=15+24+40=79 m^2
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