Two identical cubes of side 9cm are joined together end to end. Then the surface area of the resulting solid is--------------
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Given :-
Two identical cubes of side 9cm are joined together end to end.
To Find :-
Surface Area
Solution :-
Total length = 9 + 9 = 18 cm
Now
TSA = 2(lb + bh + lh)
TSA = 2[(18 × 9) + (9 × 9) + (18 × 9)]
TSA = 2[162 + 81 + 162]
TSA = 2[405]
TSA = 810 cm²
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