gaspersic/freeCodeCamp
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Fix superscripts (#34921)

Browse Source 
Fix the superscripts for squares and cubes in area and volume.
This commit is contained in:
Sudhakar Kumar
2019-04-25 13:33:26 +05:30
committed by Randell Dawson
parent 7d4b630478
commit 6c02554045
1 changed files with 9 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
guide/english/mathematics/area-of-a-circle/index.md
View File

@@ -71,18 +71,18 @@ The holes are 0.4 m wide and 1 m deep, how much concrete should Max order for ea
The holes are circular (in cross section) because they are drilled out using an auger.
The diameter is 0.4m, so the Area is:
A = (π/4) × D2
A = (3.14159.../4) × 0.42
A = 0.7854... × 0.16
A = 0.126 m2 (to 3 decimals)
A = (π/4) × D<sup>2</sup> </br>
A = (3.14159.../4) × 0.4<sup>2</sup> </br>
A = 0.7854... × 0.16 </br>
A = 0.126 m<sup>2</sup> (to 3 decimals) </br>
And the holes are 1 m deep, so:
Volume = 0.126 m2 × 1 m = 0.126 m3
So Max should order 0.126 cubic meters of concrete to fill each hole.
Volume = 0.126 m<sup>2</sup> × 1 m = 0.126 m<sup>3</sup> </br>
Hence, Max should order 0.126 cubic meters of concrete to fill each hole.
Note: Max could have estimated the area by:
1. Calculating a square hole: 0.4 × 0.4 = 0.16 m2
2. Taking 80% of that (estimates a circle): 80% × 0.16 m2 = 0.128 m2
3. And the volume of a 1 m deep hole is: 0.128 m3
1. Calculating a square hole: 0.4 × 0.4 = 0.16 m<sup>2</sup>
2. Taking 80% of that (estimates a circle): 80% × 0.16 m<sup>2</sup> = 0.128 m<sup>2</sup>
3. And the volume of a 1 m deep hole is: 0.128 m<sup>3</sup>
#### Something more about circle
* ARC- An arc is part of the circumference of a circle.