490:560=7:8
19:20

60*7/8+30*19/20=81
81:108=3:4
1/3=33.33%

Any smart way bro ?

3xkm/h 2xkm/h
- - - - - 120- - - - (I)- - - - - 160- - - - (II)
Xkm/h
- - - - - - - - - - - - - - 6hrs

1st accident taken place 30 farther
from 1st point and taken place
2nd accident taken place 60 km form the second accident point
Than 7/4 hrs earlier
- - - - - - - Ist accident- - - - - -
3x 3x
- - - - - - - 120- - - |- - - - -
30km
IInd accident
2x 2x
- - - - - -160 - - - |- - - - - - - -
60km
(30/2x-30/3x) + (60/x-60/2x)
= 7/4
3X= 60km/h

Total female=100x
Total englisj speakers=15x/0.3=50x
Marathi=50x+100
Marathi male=15*1.3x=19.5x
Marathi female=30.5x+100

Total female inc maarthi=130.5x+100=883
130.5x=783
X=6

Marathi female=283..max female of any language

Total distance and speed

3xkm/h 2xkm/h
- - - - - 120- - - - (I)- - - - - 160- - - - (II)
Xkm/h
- - - - - - - - - - - - - - 6hrs

1st accident taken place 30 farther
from 1st point and taken place
2nd accident taken place 60 km form the second accident point
Than 7/4 hrs earlier
- - - - - - - Ist accident- - - - - -
3x 3x
- - - - - - - 120- - - |- - - - -
30km
IInd accident
2x 2x
- - - - - -160 - - - |- - - - - - - -
60km
(30/2x-30/3x) + (60/x-60/2x)
= 7/4
3X= 60km/h

Caslet DI:
---------------
Following information gives the data regarding luxury watches and sports watches sold by five different stores A, B, C, D and E respectively.

Luxury watches sold from store B are 40 more than store A and 40 less than store C. Luxury watches sold from store D are 40 more than that from store C and 40 less than that from store E and are equal to 440. Luxury watches and sports watches sold from store C are in the ratio 16: 15 respectively. Total sports watches sold are 500 more than the total luxury watches. 20% of sports watches sold are from store A and 28% of sports watches sold are from store E. the ratio of sports watches sold from store B and D are in the ratio 25: 12 respectively

Anyone please solve this question and share your Approach??

Let x be the no of luxury watches in
B
A - x-40
B - x
C - x+40
D - x+80
E - x+120
D = 440
X+80 = 440
X = 320
A B C D E
320 360 400 440 480 ( luxury)
Total 2000
Sports watch - 2500
C = 375
A = 500
E = 700
Total 1575
Remaining = 2500-1575 = 925
37x = 925
X = 25
B D
625 300
A B C D E
500 625 375 300 700 ( sports)

876 - 678 = 198
876 + 678 = 1554

198 < 3rd side < 1554
ttl = 1355

A+B+C+D+E = 43200 cp
B:C:E = 7:6:9 cp
A =8160
B+C+D+E = 35040

A B C D E
+10% -15% - 22% +15% 20%
D:E
23 :30 sp
20: 25 cp

9 = 25 for E
20 =20 for D
7 = 25*7/9 for B
6 = 50/3 for C

B:C:D:E
175/9 + 50/3 +20+25 = 35040
1 = 912
8160*11/10+8400*85/100 : 7200*78/100 + 8640*115/100
8160+7140 : 5616+9936
16116 : 15552
1343 : 1296✔️

Solution plzzzzz✍

2D/(4x-3) + 3D/(4x-2) = 47t........I

30Dx-13D = 47t(16x^2-20x+6)
D(20x-13) = 47t(16x^-20x+6)
D = 47t(16x^2-20x+6)
- - - - - - - - - - - -
(20x-13)

5D/4x-3 = 50t..................... II

D = 10t(4x-3)

D = 47t(16x^2-20x+6)
- - - - - - - - - - - -
(20x-13)
10t(4x-3)(20x-13) = 47t(4x-3)(4x-2)

20x-13 = 18.8 - 9.4
X = 3

D = 5D/4*3-3 = 50t
= 90t
5D/(5x+3) = 47t-17.6
47t - 5*90t/18 = 17.6
t=17.6/22 = 8

5D = 8*90*5 = 360km✔️

Let upstream dis = 10x
40% = 4x with spd 3kmph
Rst = 6x. With spd 2kmph

Let boat spd = a
Up spd = a-3

10x/a-3 * 0.94 = 4x/a-3 + 6x/a-2

5.4x/ a-3 = 6x / a-2

0.9/a-3 = 1/a-2

a-3 = 0.9a - 1.8

0.1a = 1.2

a=12. Down spd = 15

4x/9 + 6x/10 - 17.6 = 10x/18

95x - 50x = 17.6*90

x = 36. 10x = 360