A rectangular board measure 21mby70.circutar plates are to be cut out from the board of diameter 14cm.How many plates can be cut and how much board will be left?
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Answer:
Step-by-step explanation:
For board:
length= l =21m
=2100cm
breadth=b=70
=7000cm
For plates:
Radius= r =14 cm
Area of rectangle=l*b
=2100*7000
=14700000cm^2
Area of circle= πr^2
=22/7*14*14
=176cm^2
No. of plates = 14700000/176
=83522
Area of cardboard left =Area of cardboard -83522(Area of circle)
=14700000-83522*176
=128cm^2
Hope it will work!!!
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