1.

A rectangular sheet of plastic has dimension 40 cm × 25 cm. 224 circular buttons of diameter 2 cm are cut out from this sheet. the area of the sheet left out is1. 593.28 cm22. 293.64 cm23. 444.96 cm24. None of the above

Answer» Correct Answer - Option 4 : None of the above

Given 

Dimension of rectangular sheet = 40 cm × 25 cm 

Formula Used 

Area of rectangle = length × breadth

Area of circular button = πr2 

Calculation;

Area of sheet = 40 × 25 cm2   = 1000 cm2

Area  of button =  3.14 × 1 × 1 cm= 3.14 cm2

Area of 224 buttons = 224 × 3.14 cm2  =703.36

Area of sheet left out = (1000 - 703.36) cm2  = 296.64 cm2

∴ The required answer is None of these 



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