Question

how many bits of 10 cm into 15 CM can be cut out of paper sheet of side 2.5 m into 3 cm solution my question

Answer 1

If your sheet is 2.5m × 3cm, you can't get 10cm×15cm pieces from it.

If your sheet is 2.5m × 3m
2.5m = 250cm
3m = 300cm

total area of sheet = 250 × 300 = 75000 cm^2

Area of smaller bits to cut out = 10cm × 15cm = 150 cm^2

Number of bits = 75000 ÷ 150 = 500

You can cut out 500 bits of 10cm×15cm

Answer 2

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



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