4 cubes of side 5 cm are joined end to end find the surface area of resulting solid
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Answer:
Length of new solid (l) = 5×4=20cm
Height (h) = 5 cm
Breadth (b) = 5 cm
Step-by-step explanation:
Surface area = 2 ( lb + bh + hl )
= 2 ( 20×5 + 5×5 + 5×20 )
= 2 ( 100 + 25 + 100 )
= 2 × 225
= 450 sq. cm
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