If Mary walks in a perfect circle around a perfectly circular pond, approximately how far has she walked if the diameter of the pond is measured to be 48 feet and she has taken …

Question

asked Jun 28, 2020 200k views

2 Answers

Arlen Anderson · Answer 1 · 2020-06-29T07:51:33+0000

Answer: Option 'c' is correct.

Explanation:

Since we have given that

Diameter of the pond = 48 feet

Radius of the pond =
$(48)/(2)=24\ feet$

As we know the formula for "Circumference of circle":

So, Circumference of circle is given by

$2\pi r\\\\=2* (22)/(7)* 24\\\\=150.85\ feet\approx 150\ feet$

Number of laps around the lap = 3

So, Distance she walked in 3 laps is given by

$150.* 3\\\\=450\ feet$

Hence, Option 'c' is correct.

MilindaD · Answer 2 · 2020-07-01T17:42:38+0000

Answer: C. 450 feet

Explanation:

Given : Diameter of perfectly circular pond= 48 feet

We know that the circumference of circle is given by :-

$C=\pi d$

Then, the circumference of pond will be :-

$C=(3.14)(48)=150.72\ feet$

Since, she has taken 3 laps around the pond.

Then , the total distance covered by her =
3* C

$3*150.72=452.16\approx450$ [Rounded to nearest tens.]

Hence, she walked 450 feet.