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Answer 1

Answer:

1. 9. =8+y so value is y=1.

2. This answer u can see in upper image that I am semded..

3. Sorry but I didn't understand this question..

4. 24 workers can complete the same work in 30 hours

5.sorry I don't know this answer

6. Given:

D1=45cm, d2 =30cm

Number of tiles =3000

Rate per m^2 =₹4

Area of rhombus =1/2×d1×d2

=(1/2) × 45 ×30= 675

Area of one tile =675cm^2=675 /10000m^2

Area of 3000 tiles =3000 ×(675/10000)

[1cm ^2=1/10000m^2]

Cost of polishing the floor =total area ×rate

=(3000×675)×4)/10000

=3×675×4/10

=3×67.5×4

=12×67.5

=₹810

Sorry dear but I know only this much hope it's helpful for you

Answer 2

Step-by-step explanation:

trapezium ABCD

AB∥CD,

AB=30cm and CD=44cm, AD=13cm,BC=15cm.

semi-perimeter =

2

30+44+13+15

=51

area of trapezium =

(s−a)(s−b)(s−a−c)(s−a−d)

⋅

(b−a)

(a+b)

where a and b are two parallel sides and b > a and c and d are non-parallel sides

s=

2

a+b+c+d

=51

area of trapezium ABCD=

44−30

30+44

⋅

(51−30)⋅7(51−30−13)⋅(51−30−15)

=

14

74

⋅

21⋅7⋅8⋅6

=

7

37

⋅7

3⋅3⋅2⋅8

=37×3×4=37×12=444cm

2

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