सुखी वैवाहिक जीवन के लिए पत्नी और पती को किन-किन बातों का ध्यान रखना चाहिए
Answers
Answer:
The cost of cementing inside the tank is $6888.
Step-by-step explanation:
Given :
Length, breadth and depth (height) of the inside open safety tank are 6 m, 4 m and 7 m.
Rate of cementing is $42 per sq metre.
To find :
The cost of cementing inside the tank.
Solution :
[The shape of tank is cuboidal because it have length, breadth and height (or depth)]
We have to find cost of cementing inside the tank so, for this first we need surface area of inside of the open tank.
• Surface area of inside of the open tank = 2(lb + bh + lh) - lb
[Where, l is length, b is breadth and h is height or depth]
Put all values :
\implies⟹ Surface area = 2 × [(6 × 4) + (4 × 7) + (7 × 6)] - (6 × 4)
\implies⟹ Surface area = 2 × (24 + 28 + 42) - 24
\implies⟹ Surface area = (48 + 56 + 84) - 24
\implies⟹ Surface area = 188 - 24
\implies⟹ Surface area = 164
Thus,
Surface area of inside of the open tank is 164 m².
=> Cost of cementing 1 m² = $42
=> Cost of cementing 164 m² :
\implies⟹ 164 × 42
\implies⟹ 6888
Therefore,
The cost of cementing inside the tank is $6888.