Question

Work out the are of this circle. take pi to be 3.142 and give your answer to 2 decimal places. the diameter is 9 m

A) 63.62 square meters
B) 31.81 square meters
C) 63.62 square units
D) 28.27 square meters
E) 28.27 square units

Answer 1

Rounded to two decimal places, the area is approximately 63.68 square meters. So, the closest option is A) 63.62 square meters when rounded to two decimal places.

To find the area of a circle using its diameter, you can use the formula:

Area=π×( diameter/2 )^2

Given the diameter is 9 meters, the radius (9/2 ) is 4.5 meters.

Now, using π=3.142:

Area=3.142×(4.5)^2

Area=3.142×20.25

Area=63.6795

Rounded to two decimal places, the area is approximately 63.68 square meters. So, the closest option is A) 63.62 square meters when rounded to two decimal places.