Question

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The pillars of a temple are cylindrical shaped. If each pillar has a circular base of radius 20cm and height 7m, then find the quantity of concrete mixture used to build 20 such pillars. Also find cost of concrete mixture at the rate of Rs. 200 per m3. ( =22/7) 5. If a right circular cone has radius 4 cm and slant height 5 cm then what is its volume? ​

Answer 1

Step-by-step explanation:

height=10m

radius=20cm

=0.2m

we have to find it's volume to find the concrete mixture required.

volume=πr²h

=22/7×0.2×0.2×10

=8.8/7m²

total mixture required to build 14 such poles

=8.8/7×14

=17.6m²

hence, 17.6m² mixture is required.

Answer 2

Answer:

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Volume of the cylinder=πr

2

h

=π×0.25×0.25×10.5

=

7

22

×0.25×0.25×10.5

=2.0625cm

3

∴ Volume required to build each pillar=2.0625m

3

Now the total number of pillars=32

Total volume of concrete required=32×2.0625=66

Rate= Rs. 250/m

3

∴ Total cost=66×250=Rs. 16500.