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100 115
100. 75
115= 620
100= 12400/23

60:69
92:69 1200-12400/23= 15200/23
152=15200/23
92= 400 cp for B
1200-400= 800cp for A✔️

A------------------900 km...............B

225/75 , 450/45, 225/50
900/180= 5 hrs equal phrases of time

30*5+5*60+5*90= 900

For 3 hrs = 75*3+3*30= 315
For 5hrs = 45*5+30*2+60*3
= 465

For 1 hrs = 60*1+45*1 = 105

465+105+315= 885
900-885= 15/105= .14 hr
Total time= 9.14 hrs✔️

20 Liter*64= 1280
Cp= 1280+xy
Sp= (20+x)*80
1/4*28/25= 28% profit

(1600+80x)/(1280+xy)= 32/25
5000+250x= 5120+4xy
-120+250x= 5120+4xy
32xy= 2000x-960......(I)

1/3*4/3= 1/3
1600+320x/1280+4xy=4/3
4800+960x= 5120+16xy
32xy= 1920x-640........(II)

(I)+(II)
2000x-960= 1920x-640
80x= 320
X=. 4 Litre

32xy= 2000x-960
Y= 55 rs/L
80*7/10= 56

64. 55
56
1:8✔️

By allegation??

15% 27%

a%
1 5

a%=15+27*5/6=>25%

25% 16%

22.75%

6(¾) 2(¼)=3 : 1

4=80k 1=20k

Sol plz

R. S
8. :. 5
Profit 24,000. 27,000
8= 24,000
5= 15000
27000-15000
12000/12= 1000rs✔️

1280*4/5+40= 95%
100= 1120
1120+1280= 2400✔️

Photo from RAJARAJESWARI

Ramesh: Sandeep
5. :. 3
Ramesh+ Rahul = 30. 30
Ramesh+ Rahul+. 900
Sandeep=22.5. 40

5x+y= 30
8x+y= 40
X= 10/3
Y= 40/3
TW= 900/40/3
=67.5 days ✔️

Anyone?

x+y/x-y=3/2
x/y=5/1

x+40/a+b + x-40/a-b = 20
x+40/6z + x-40/4z= 20..….I

x+40/5z= 12
x= 60z-40

x+40/6z+ x-40/4z= 20
60z/6z+ x-40/4z= 20
z= 4

x+40/5z=12
x+40= 240
x= 200km✔️

A : B
36:45
36*1/3= 12
3:4 cp of item
3= 12
4= 16
7= 28
45-16= 29
29= 145
28= 140✔️