A cardboard crate is 6 dm long, 3.4 dm wide and 3 dm high. Find its total surface area in cm^2 and dm^2. If the total crate surface is 5/6 of the total cardboard surface used to construct the box, how much cardboard was used?
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Answer:
TSA = 2(lb+ bh + lh)
l=6 d.m.
b=3.4 d.m.
h=3 d.m.
lb =(6 * 3.4) d.m.
= 20.4 d.m.
bh = (3.4 * 3) d.m.
= 10.2 d.m.
lh = (6 * 3) d.m.
= 18 d.m.
TSA =( 2(20.4 + 10.2 + 18) )d.m.
= (2 * 48.6) d.m.
= 97.2 d.m.^{2}d.m.
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