Question

a circular water reservoir has a radius of 0.3 kilometer. what is the approximate area covered by the reservoir? use 3.14 for π.

Explanation:

Step1: Recall area formula

The formula for the area of a circle is $A = \pi r^{2}$.

Step2: Substitute values

Given $r = 0.3$ km and $\pi=3.14$, we have $A=3.14\times(0.3)^{2}$.

Step3: Calculate result

$(0.3)^{2}=0.09$, then $A = 3.14\times0.09=0.2826\approx0.28$ square kilometers.

Answer:

0.28 square kilometers