Question

a swimming pool is 30 m in length , 10 m in breadth and 6 m in depth . find the cost of cementing its floors and walls at the rate of rs 14 per sq. m.

Answer 1

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Step-by-step explanation:

Given that,

l=30m

b=10m

d=6m (d-h)

We know that,

Area for coner its floor2d(l+b)+lb

=2(6)(30+10)+(30×10)

=12×40+300

=480+300

=780m²

Rate of coner its floor Rs.14/m²

∴ Total cost of coner its floor =780*14

Rs.10920

Then,

We get Rs.10920

Answer 2

Answer:

Step-by-step explanation:

Area=2h(l+b)+l*b

This is because they asked to cement the walls (whose area is 2h(l+b)) as well as the floor(whose area is l*b)

=2*6(30+10)+30*10

=12*40+300

=480+300

=780m2

Cost of cementing=780*14

=10920 rupees