Two cubes each of volume $125 cm^3$ are joined end to end. The surface area of the resulting solid is
Answer & explanation
Correct answer: option 2
Volume of cube = (side)³
(side)³ = 125
(side)³ = (5)³
side = 5 cm
Total length of side of new cube = 5 + 5 = 10 cm
breadth = 5
height = 5
Surface area of resulting cuboid = 2 ( lh + bh + hl )
= 2 ( 10 × 5 + 5 × 5 + 5 × 10 )
= 2 ( 50 + 25 + 50 )
= 2 ( 125 )
= 250
The correct answer is Option (2) → $250 cm^2$