Question

solve the above questions..​

Answer 1

3. given =radius of thecircle =98cm

soln = area =πr²

=area =22/7*98*98

=area = 22*14*98

=area=30184cm²

Answer 2

Answer:

Step-by-step explanation:

3. Given,

Radius = 98cm.

Area = πr²

Area = 22/7*98*98 = 22*14*98 = 30184 cm².

4. Given,

Diameter = 105cm

Radius = 105/2 = 52.5

Area = πr² = 22/7*525/10*525/10 = 8662.5 cm².

5. Given,

πr = 220cm

Radius(r) = 22000/314 = 70.06 cm

Area = πr² = 3.14*70.06*70.06 = 15412.3 cm².

6. Given,

Side of the square = 3cm.

Radius of the circle = 2.12cm.

   Area of the remaining Part = Area Of circle - Area Of Square

                                                   =πr²-a²

                                                   =22/7*212/100*212/100 - 3².

                                                   = 14.12 - 9

                                                   = 5.12cm².

7. 2(πr²) = 2*22/7*42*42 = 11088 * 2 = 22176 cm².

Cost = 37*22176 = ₹820512.

8. Total amount of ribbon used = 56 * 3 + 12(For Bow)

= 180cm = 1.8m

Cost = 15 * 1.8 = ₹27.

Radius of the scroll ,

2πr = 56cm          [56cm ribbon used in one turn]

2*22/7*r = 56 cm.

44/7*r = 56cm.

r = 56*7/44 cm

r = 8.9 cm

r= 9cm   [Round Off]

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