+0  
 
0
1387
4
avatar+600 

I hate ratio cheeky

 

1. In a quadrilateral PQRS, the angles P, Q and R are in the ratio 1:4:8 and their sum is 273degrees.

    Find (a) angle S (b) angle R

(a) 360-273= 87degrees

     angle S= 87degrees

 

(b) idk 4 'b'

 

2. A sum of money is divided in the ratio 2:3:7. Given that the largest share is $112, calculate the smallest share

 

3. Express the following ratio in their lowest forms, giving your answer in the form m:n where m and n are integers.

(a) 42:30

(b) 700g:1.75kg

(c) 345ml:0.12L

(d) 1/8:3/5

(e) 0.39:16.9

(f) 0.068km: 850m

 

dats all.

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 Mar 12, 2016

Best Answer 

 #2
avatar+600 
+10

thx solveit.

 

but i dn't get how u got the '168' 4 ques 1. (b)

n i need help 4 ques 3. (d) and (e)

 

can u help plz.

and thx again

 Mar 12, 2016
 #1
avatar+2498 
+5

1. In a quadrilateral PQRS, the angles P, Q and R are in the ratio 1:4:8 and their sum is 273degrees.

    Find (a) angle S (b) angle R

(a) 360-273= 87degrees

     angle S= 87degrees

 

So you found angle S right ! :)

 

angle R:

the angles P, Q and R are in the ratio 1:4:8 and their sum is 273degrees.

you can write in term s of 1:4:8    1x:4x:8x   and their sum is 273degrees:

\(x+4x+8x=273 \\ 13x=273 \\ x=21\)

 

our

R=8x

R=168

 

2.A sum of money is divided in the ratio 2:3:7. Given that the largest share is $112, calculate the smallest share

 

So the largest is 7x which is 112:

\(7x=112 \\ x=16 \)

 

and the smallest one is 2x :

\(x=16 \\ 2x=32\)

 

3. Express the following ratio in their lowest forms, giving your answer in the form m:n where m and n are integers.

(a) 42:30

\(42:30 \text{ (devide both sides by 2 )}\\ \frac{42}{(2)}:\frac{30}{(2)} \\ 21:15 \text{ (devide both sides by 3 )}\\ \frac{21}{(3)}:\frac{15}{(3)}\\ 7:5\)

 

for that you need to find common devisor and devide it until you will not left with any common devisor (sorry for english :D).The others in the same rule (if you will stuck write it on the calculator here it will show you it on the fraction form for example:\(\frac12 \)  it is 1:2)

 Mar 12, 2016
edited by Solveit  Mar 12, 2016
 #2
avatar+600 
+10
Best Answer

thx solveit.

 

but i dn't get how u got the '168' 4 ques 1. (b)

n i need help 4 ques 3. (d) and (e)

 

can u help plz.

and thx again

Eloise1st Mar 12, 2016
 #3
avatar+2498 
+5

P:Q:R                               P+Q+R=273                                              

1:4:8                        

x:4x:8x

 

x+4x+8x=273

x=21

 

 

look below the R is 8x SO:

x=21

8x=168

 

3.

(d)

 

 

 

answer is 5:24      

Solveit  Mar 12, 2016
 #4
avatar+118587 
+5

Hi Eloise and Solveit,  

Thanks for all those answers Solveit. :)

I have only just seen your post.  Do you understand now Eloise?  If not then say so!

And, it is great to see you one the forum again too Eloise :)

 Mar 13, 2016

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