Question

a sheet of paper measure 30 cm by 20 CM .a strip 4cm wide is cut out from it all around. find the area of the remaining sheet and also the area of the strip cut out

Answer 1

Let ABCD denotes the rectangular sheet.

Length of sheet = 30 cm

Breadth of sheet = 20 cm

∴ Area of sheet = Length × Breadth

                         = (30 × 20) cm2

                         = 600 cm2

4 cm wide strip is cut from rectangular sheet all around, then we obtain a rectangular sheet PQRS, having

Length = (30 – (4 + 4)) cm = 22 cm

Breadth = (20 – (4 + 4)) cm = 12 cm

∴ Area of remaining sheet PQRS = (22 × 12) cm2  = 264 cm2

∴ Area of strip cutout = Area of sheet ABCD – Area of sheet PQRS

                                   = (600 – 264) cm2

                                   = 336 cm2

Answer 2

Answer:

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