A cuboid has the total surface area 162cm square . If it's breath and height are 3cm and 3 cm respectively , what is the length?
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TOTAL SURFACE AREA [ T.S.A]= 162 CM SQ
BREADTH = 3 CM
HEIGHT = 3 CM
T S A= 2[ LB +BH+HL]
162 CM SQ = 2 [ L*3+3*3+3*L]
162 CM SQ = 18[3L + 3L]
162 CM SQ = 18 * 6 L
THEREFORE, L = 162 /108
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