Question

Question -29
Please answer this question

Answer 1

Answer:

formula of inner curved surface area is 2πrh

first divide 3300 by 30 to get the inner curved surface area

it will be 110

now put in the formula 2πrh = 110

2*22/7*x*10 =110

440*x/7 = 110

x = 110*7/440

x = 7/4

radius is 7/4 diameter will be 7/2

now to find the capacity we have to find the volume which is

πr^2h

22/7*7/2*7/2*10

770/2 = 335m^3

now 1m^3 = 1000 litres therefore

335*1000 = 335000litres

pls mark it as brainliest

Step-by-step explanation:

Answer 2

Answer:

i) 110 m²

ii) 3.5 m

iii) 96.25 m³

Step-by-step explanation:

Here,

Given is that the cost of white washing the inner surface area at Rs.30/m² is Rs.3300...

So, the Inner Surface area will be:

⇒$\frac{Total Cost}{Rate}$

⇒Rs. 3300 ÷ Rs. 30/m²

Inner Surface Area = 110 m²...... 1

Now,

To find the Diameter, we need to replace values...

Inner Surface Area ⇄ C.S.A of a Cylinder

C.S.A of a cylinder = $2\pi rh$....... 2

Including 1 & 2,

$2\pi rh$ = 110 m²

⇒ 2 × $\frac{22}{7}$ × r × 10m = 110 m²

To get the Diameter, 2r = d

⇒ $\frac{22}{7}$ × d × 10m = 110 m²

By Substituting values,

d =  $\frac{110 m^{2} * 7}{22*10}$

⇒ Diameter = 3.5 m....

Finally,

Capacity is nothing but VOLUME of the well....

So,

Volume of the Cylinder = $\pi r^{2} h$

⇒ $\frac{22}{7}$ × 1.75m × 1.75m × 10m

⇒ Volume of the Well = 96.25m³....

⇒1m³ = 1000$l$

⇒Volume of the Well = 96250 litres (96.25 kilo litres)....

Hope you Understood the Concept I have utilized to solve this Sum....