Math, asked by ankitkumar51, 1 year ago

please solve this question no. 12 and 13

Attachments:

sivaprasath: You didn't give 13th Question, you showed 11th and 12th,.

ankitkumar51: Sorry, Question no 11 and 12

sivaprasath: ok,. 11) 42cm^2 12) Rs.3696

sivaprasath: 4) 4620* That, one was by mistake***

vanshuman02: Q11.

sivaprasath: Q 11 ) 42cm^2

ankitkumar51: How

Answers

Answered by vanshuman02

Let the radius of the park be r ,Let the radius of the bigger circle (park + road) be R.Given ,Circumference of the park is 176m.2πr = 176mTherefore, r=28mWidth of the road = 7mTherefore,R=r+7R=28+7=35mThe circumference of the bigger circle (park+road) = 2πR=220mCost of fencing is ₹21 per m.Therefore cost of fencing 220m is ₹21*220=₹4620Hope you understandMy first answer..Q11.Area of square is 196cm^2a^2 = 196 a=14cmTherefore the radius of the circle is 7cmArea of circle is 154cm^2Circumference of the circle is 44cm
The area of remaining part of the square is area of square - area of circle
=196-154cm^2
=42cm^2

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