Question

(Take I = 3.14)
the circle
Of
9. Find the radius and the circumference of a circle whose area is 144 cm?
10. How many times will the wheel of a car rotate in a journey of 88 km, given that
the diameter of the wheel is 56 cm?
​

Answer 1

Answer:

1.0.785m2

2.50 , 000

Step-by-step explanation:

1.We have :

Circumference of the circle = 3.14 m = 2πr

⇒3.14 m =(2×227 x r) m⇒r=(3.14×72×22) m = (12) m.

Area of the circle (A) = πr2

⇒A = 227×(12)2 m2⇒A =(227×12×12) m2 = (2228) m2 = 0.785 m2.