Question

Question number 14. solution

Answer 1

Answer:

Step-by-step explanation:

Fig 15.69

Radius of the small circle is 3.5cm so area of the small circle is π*(3.5)^2

= 38.48sq.cm

Again the area of the bigger circle = π*(7)^2sq.cm=153.93sq.cm

So the area of the shaded region = 153.93-38.48sqcm

=115.45sq.cm

Fig 11.70

Area of the bigger quarter π*(3.5)^2/4=9.62sqcm

And the area of the smaller quarter π*(2)^2/4=3.1415sqcm so the area of the shaded region is 9.62-3.1415=6.4785sq.cm