from a rectangular sheet of dimension 27cm by 17cm . 27square buttons are cut whose side is 4cm . find the remaining part of rectangular sheet
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Answer:
286 cm 2
Step-by-step explanation:
Total surface area of cuboid = 2 (lb + bh + hl)
Surface area of given cuboid
= 2(27 × 8+8 × 1+27 × 1) = 502 cm
2
Volume of cube = 27 × 8×1 = 216cm
3
∴ Edge of the cube a =
3
216
= 6 cm
We know that,
Total surface area of cube = 6a
2
Surface area of this cube = 6×(6)
2
= 216 cm
2
Hence, the difference of surface areas = 502−216=286 cm
2
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