Question

Three cubes each of side 5 cm are joined end to end. What is the surface area of the resulting cuboid

Answer 1

surface area of cuboid=2(l×b+b×h+h×l)

l=5cm

b=5+5+5=15cm

h=5cm

so,2(5×15+15×5+5×5)

=2(75+75+25)

=2×175

=350sqcm

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