A contractor agrees to sink a well 80m deep at a cost of Rs. 9.00 for the first meter; Rs. 9.50 for the second meter and an extra 50 paisa for each additional meter. find the the total cost and the cost of the last meter
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Answer:
Step-by-step explanation:
The cost of sinking a tube well is Rs.7121.52.
The cost of cementing is Rs.6594.
Step-by-step explanation:
Given : A tube well 280 m deep having diameter 3 m at the rate of Rs.3.60 per m³.
To find : The cost of sinking a tube well and the cost of cementing its inner curved surface area at the rate of Rs. 2.50 per m² ?
Solution :
The height of the well is h=280 m
The diameter of the well is d=3 m
The radius of the well is
Volume of the well is
The cost of sinking = Rate × Volume
The cost of sinking a tube well is Rs.7121.52.
The inner curved surface area is
The cost of cementing = Rate × Area
The cost of cementing is Rs.6594.
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