y = x - y => x : y = 2 : 1
P × (100+x)%× (100-y)%= p
P× (100+100)% × 50%= p

x = 100

Y) inc:exp = 3:2

Inc) 3 4)*5*3
Exp) 4 5)*4*2

45 60
32 40
—————
13 20

(22-18.5)+ (19-18.5)-(15-18.5) = 7.5

No of students= 7.5/0.5= 15 students

Any short

x = (√3/2) + (1/2)
x - 1/2 = √3/2
x² + 1/4 - x = 3/4
x² - x = 1/2
2x² - 2x = 1
4x³ - 4x² = 2x

So,
4x³ + 2x² - 8x + 7
= 6x² - 6x + 7 = 3 ( 2x² -2x )+ 7
= 3• 1 + 7 = 10
4x³ + 2x² - 8x + 7 = 10

(16+5)×4= 84 - 25%= 63
16 : 5
2 : 1 = 16 : 8

21 == 63
3 == 9 liters
x = 9 liters

Explain

15 30
30
2 1

2min == 3
18min == 27
+1 == 29
+1 == 30
---------------
20 min ✅

(10+X) (20+X)

M

7 3

70+7X+30+3X=10M
100+10X=10M
10+X=M

10+X=18 X=8

52170*100/111*100/94=50k

100 88 88×9/8= 99

Loss = 100-99= 1%

Tw = 30× 3= 90

A absent on = 4,8,12,16,20....th days

B absent on = 6,7...13,14...20,21...34,35

C absent on = 8,9,10....18,19,20...28,29,30....

Till 40 days
By A = 40/4= 10
By B = 35/7)× 2= 10
By C = 40/10)× 3=12

Work done =
40×3 - 10 - 10 - 12= 88 units

Remaining =90-88 =2 units

on 41st day b is absent, but A+C is working ,

So 2/2= 1 day

Time = 40+1= 41 days