39. A rectangular sheet of plastic has dimension 40 cm x 25 cm. 224 circular buttons
of diameter 2 cm are cut out from this sheet. The area of the sheet left out is
(a) 593.28 cm2
(b) 296.64 cm2
(C) 444.96 cm
(d) None of the above
Answers
Answer:
Area of sheet =40×25 cm^2
=1000 cm^2
Area of button =3.14×1×1 cm^2
=3.14 cm^2
Area of 224 buttons =224×3.14cm^2
=703.36cm^2
Area of sheet left out =(1000−703.36)cm^2
=296.64cm ^2
please mark as brainliest.
Step-by-step explanation:
Answer:
d) none of the above
Step-by-step explanation:
Area of rectanglular sheet = l×b
l = length = 40cm ( given )
b= breadth= 25 cm ( given )
then, area will be
area of rectangular sheet = l×b
= 40cm × 25 cm
= 1000 cm^2
thus, we find that area of rectanglular sheet is 1000cm^2
area of buttons = πr^2
diameter is given = 2cm
then, area of button = 22/7 × 1^2
=22/7× 1 =22/7cm^2
area of such 224 buttons = 224×22/7
=704cm^ 2
the area of the sheet left = ( area of rectangular sheet - area of circular button )
= 1000cm^ 2 - 704cm^2
= 296cm^ 2 answer