1 : 3
8=2
1=1/4

1 : 7
Int=6. Tym=6/1/4=>24yrs

Short:-

2time=8yrs
6time=24yrs

How to solve these two equations ?

a=200+b

7b+4.5b=4600
11.5b=4600. B=400 a=600

A -  b = 200)*7
7a+4.5b = 6000
---------------
    11.5b = 4600
     B = 400
A = (400+200)= 600

4 : 8

80=4
100=5. 8-5=3

%=3/12=>1/4=>25%

12½%=1/8
6⅔%=1/15

AJ : SU : SA
9. :. 8)5
16. 15)3
48. 45. 40

8=40. 133=665

2πr(r+h): 3πr²
2(2+1):3*1
2. : 1. =>1/1=>100%

4000/10600=40/106=>>20/53

20 : 33

11=33 1=3. 6=18 5=15

18 : 15 : 20

2=600. 1=300 18=3600

2/3=24
01=36days

=>36. C=1. BC=4. B=3

B=36/3=>12days

AB : A
3. : 1

A : B
1 : 2. 2=3. 1=3/2

A alone work=36*2/3=>24days

1200/3=400
960-800=160

80/500=>16%

Meeting time=560/120=>4⅔hrs

D=4⅔*30=>140km