Question

from a rectangular sheet of dimension 27cm by 17cm . 27square buttons are cut whose side is 4cm . find the remaining part of rectangular sheet​

Answer 1

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