Transpositioning techniques to solve equations and Formula

Nov 2015
18
0
Devon


1. calculate the area of the triangular fields, and the length of perimeter fencing required to secure the site. AB= 20m, Angle ABC= 60 degrees, Angle ACB= 20 degrees and angle BCD= 60 degrees.




2. The width of a river at a certain section is 60m. Soundings of the depth of the river taken at this section are recorded as follows


DIstance from left bank (m)051015202530354045505560
Sounding Depth (m)489193035302420161080


Plot the above information, estimate the cross sectional are of the river at this section in m^2, If the volume of water flowing past this point per per second is 10,000m^3, calculate the spped, in m/s, at which the river is flowing. Hint, Volume of flow per second = cross-sectional area x velocity of flow


3. WCB of road AB= 42 degrees, WCB of road BC= 152 degrees. Radius of curvature joining 2 lines is 120m

calculate

a) The length of the tangent AB and BC
b) The length of chord AC
c) The length of curve AC
d) The angle of deflection
e) The angle of deviation

4.
 

chiro

MHF Helper
Sep 2012
6,608
1,263
Australia
Hey par1996.

Can you please show your attempts for these questions?
 
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Nov 2015
18
0
Devon
Hi thanks for the reply chiro, I'm currently in college at the moment in England so I can't send my notes as they are all paper based
 

Prove It

MHF Helper
Aug 2008
12,897
5,001
Hi thanks for the reply chiro, I'm currently in college at the moment in England so I can't send my notes as they are all paper based
You could scan your notes and post them as a picture, type out what you have done here, type it out using Equation Editor in Word, or learn some LaTeX so that you can typeset your equations using the site's inbuilt LaTeX compiler.
 
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Nov 2015
18
0
Devon
Hi I could do that however i don't have a scanner. I just need some help from helpful members on this website
 

topsquark

Forum Staff
Jan 2006
11,578
3,454
Wellsville, NY
Hi I could do that however i don't have a scanner. I just need some help from helpful members on this website
The point is that we don't know how to help you if we have no idea what you are able to do.

-Dan
 
Nov 2015
18
0
Devon
Hi Dan, I understand it, however I don't know what function I need to get the answer.
 

HallsofIvy

MHF Helper
Apr 2005
20,249
7,909
In the first problem,
calculate the area of the triangular fields, and the length of perimeter fencing required to secure the site. AB= 20m, Angle ABC= 60 degrees, Angle ACB= 20 degrees and angle BCD= 60 degrees.
The three angles add to 60+ 20+ 60= 140 degrees. The angles in a triangle must add to 180 degrees.
 
Nov 2015
18
0
Devon
Thanks HallsofIvy, I forget to say that there are 3 smaller triangles inside the large triangle, I would upload the picture however every time I try to it just doesn't seem to upload
 
Nov 2015
18
0
Devon
I've attached some photos to explain the questions a lot betterIMG_0575.JPGIMG_0574.JPGIMG_0573.JPGIMG_0572.JPGIMG_0571.JPGIMG_0570.JPG