Question

please answer this question and explain its urgent​

Answer 1

Answer:

Step-by-step explanation:

Circuference = 176 cm

But, C = 2πr

∴ 176 = 2 * 22/7 * r

88 = 22/7 * r

88*7/22 = r

4*7 = r

∴r = 28 cm²

Now, Area = π × r²

 A = 22/7 * 28 * 28

 A = 22 * 28 * 4

 A = 2624 cm²

Now, 90% of area is effective

∴ Area effected = 90% of Total Area

                           = 90/100 * 2624

                           =  9/10 * 2624

                           =  9/5 * 1312

                            =  11808/5

                            =  2361.6 cm²