Question

find the area of the shaded region of a circle whose diameter is 21m

Answer 1

r =21/2

area = πr²
22×21×21/7×4
346.5 m²

Answer 2

Answer:

Step-by-step explanation:Let the lengths and breadth of rectangle be l & b respectively.

Now l = b+5, perimeter = 2(l+b) = 58 cm

2(b +b +5) = 58

2b + 5 = 29

2b = 24

b = 12 and length = b +5 = 17