Question

Find the radius and circumference of a circle whose area is 1441.
A sheet is 11 cm long and 2cm wide. Circular pieces 0.5cm in diameter are cut from
it to prepare discs. Calculate the number of discs that can be prepared. I'm
Hint. First we have to cut squares of side 0.5cm.
78
Understanding ICSE Mathematics - IX
.. Height​

Answer 1

1. the area of the circle= πr²

1441 = (22/7) × r²

r² = 1441× 7/22

r² = 131×7/2

r² = 917/2

r = √458.5