Question

pls answer fast plss ​

Answer 1

Answer:

884,044 sq cm

Step-by-step explanation:

one Cylindercal pillar 's surface area = (2πr × hight of pillar) + 2(πr^2).

So ,we have =(2π × 25cm× 4m) + 2(π × 25cm ^2).

we get = 63,146 (approx)

We have to find surface area of 14 pillar.

So, 14×63,146

that is= 884,044 sq cm

Answer 2

Answer:

The total surface area to be painted = 88 m²

Step-by-step explanation:

Here we have a catch, they have asked us for the total Surface Area of the pillar, but they don't mean it.

If we logically think, pillars are painted only on its Curved Surface Area and never the top and bottom.

Here, total surface area refers to the total curved surface area of the 14 pillars.

Ok, So never check TSA for pillars when painting.

Now,

Diameter(D) = 50 cm

Radius = D/2 = 50/2

r = 25 cm

Remember to convert it to metres because height is in metres,

1 m = 100 cm

1 cm = 1/100 m

So,

25 cm = 25/100 m

r = 0.25 m

h = 4 m

CSA of Cylinder = 2πrh

Using π = 22/7

CSA of 1 pillar = 2 × (22/7) × 0.25 × 4

CSA = 44/7 m²

Now, CSA of 14 pillars = 14 × 44/7

= 88 m²

Thus, the total surface area to be painted

= 88 m²

Hope it helped and you understood it........All the best