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Answer 1

Answer 1

R = 25 cm = 0.25 m

h= 3.5 m

C.S.A = 2π r h

= 2 ×22/ 7 ×0.25 × 3.5 = 5.5 m²

cost of painting the curved surface of the pillar = 5.5× 12.50 = Rs 68.75

Answer 2

$volume \: of \: cylinder \: = \pi \: r {}^{2} h$

$\frac{22}{7} \times 7 \times 7 \times 15$

154×15

2310

Answer 3

Circumference of base = 2πr

→132 = 2×22/7×r

→r = 132×7/2×22

→r = 21

so, volume of cylinder = πr²h

= 22/7×21×21×25

= 34650

Answer 4

Diameter= 21 cm

radius=21/2=10.5

height=14 cm

curved surface area of cylinder= 2πrh

2×22/7×10.5×14

44/7×10.5×14

(14 will be eliminate with 7 )

44×10.5×2=88×10.5

924cm square

area of base circle= πr square

22/7×14

(14 will be eliminate with 7)

22×2=44

924+44=968cm square

968×5/100=4840/100

answer=48.4 rupees

Answer 5

Area of wall - area of one gate and two window

2(bh+hl)-2×1.5+2(1.5×1)

2(2×6.5+6.5×9)-(3+3)

221-6→215 m

Cost of 1m = 25

cost of 215= ?

=215×25

=5375

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Answer 2

Answer:

Hey sweetie here is your answer,

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