two cubes , each of side 15cm are joined to end to end .find the surface area of the resulting cuboid.
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surface area of resulting cuboid =2(lb+bh+hl)
=2(30×15+15×15+15×30)
=2(450+225+450)
=2(1125)
=2250
=2(30×15+15×15+15×30)
=2(450+225+450)
=2(1125)
=2250
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