2 : 3 × 5 × 9 (3)
5 : 9 × 3 × 5 (1)

6 : 9
5 : 9
--------
1 : 0

9 == 45k
1 == 5000₹

Perimeter= 4×8= 32
l = √4²+16²= 4√17

Total surface area= 1/2 pl + B
= 1/2( 32× 4√17)+ 64
= 64√17+ 64
= 64( √17+ 1) cm²

Where p = perimeter, l= slant height and B = area of base

Cross method?

> A B
Mp) 8x
Sp) 6x 13y
Cp) 5x 10y

5x - 10y = 240)*13
6x - 13y = 228)*10

5x == 840
8x == 1344

4d/15-x = 4
3d/15+x = 2
Divide both,
4(15+x)= 2•3(15-x)
30+2x = 45-3x
5x= 15
Speed of stream = 3 kmph

25%= 1/4
4⁴:5⁴= 256 : 625

881 == 35240
625 == 25000
256 == 10240

1.5/30-x + 1.5/30+x = 45/60= 3/4

1.5[ 60/900-x²] = 3/4
900- x² = 120
x² = 780
x ≈ 28 kmph

1.5/30-y- 1.5/30+y= 3/4
.5/30-y- .5/30+y= 1/4
2/30-y- 2/30+y= 1
2*2y= 900-y^2
Y^2+4y-900=0
App= 28

(30+Y)(30-Y)
Y=3/4
1=3/8Y

900-Y²)3=12Y
Y²+4Y-900=0
Y=28kmphr(app.)

Solve...

(100+25*3)%==14700
100%==8400
Interest for 3 yrs=14160-8400=5760
1 yr int=5760/3 =1920
R=1920/84 =22.8% ✔

14700-14160 = 540/3= 180
25% == 180
100% == 720
14160-720× 3= 12000

Rate = 720/12k = 6%

126/12 == 63/6

48 72
63
9 15
3:5

8 == 12
3 == 12*3/8

12*3*8/8 == 36km

32.25% - (11280 - 24%) = 532.5
56.25% == 11812.5
100% == 21000