Question

on decreasing the radius of circle by 30% it's area is decreased by

30%

60%

45%

none




me fine Niharika aap btao kaise Ho......☺☺☺☺☺☺​

Answer 1

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Answer: [d] none of these

Answer: [d] none of theseStep-by-step explanation:

Answer: [d] none of theseStep-by-step explanation:Method 1

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49=.51

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49=.51=51%

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49=.51=51%Method 2

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49=.51=51%Method 2Take r = 10. The area of a circle is (pi)*r^2, therefore the area of a circle with r = 10 is A = (pi)*10^2 = 314.159  

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49=.51=51%Method 2Take r = 10. The area of a circle is (pi)*r^2, therefore the area of a circle with r = 10 is A = (pi)*10^2 = 314.159  Now reducing the radius by 30%, we get R = 7. The area of that circle is A = (pi)*7^2 = 153.938.

Answer: [d] none of theseStep-by-step explanation:Method 1Decrease area = First area - last area= pie r ^2 - pie R^2=pie (100/100)^2- pie (70/100)^2  = 1 - 0.49=.51=51%Method 2Take r = 10. The area of a circle is (pi)*r^2, therefore the area of a circle with r = 10 is A = (pi)*10^2 = 314.159  Now reducing the radius by 30%, we get R = 7. The area of that circle is A = (pi)*7^2 = 153.938.153.93/314.159 = .49. Therefore the new area is 49% the size of the old area. Reducing the radius by 30% reduces the area by 51%.

Hope this will help you.✌

Answer 2

Answer:

ok,, good, as you I will not give you thanks, but actually my older ID Niharika133, is not working so my this ID is my main ID ok, but no problem friend ༶•┈┈⛧┈♛*＊✿❀　❀✿＊*.・゜゜・helo