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l=17, b=15, h=13, and x =1 Volume of hollow cuboid = l× b× h –(l-2x) (b-2x) (h-2x) --where, x is the thickness of walls of the cuboid = 17×15×13 – (17-2) (15-2) (13-2) =3315 -13×12×8 =3315- 1268 = 2407cm3
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Two numbers are respectively 30% and 40% more than a third number. Find the ratio of two numbers.
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