the capacity of an open cylindrical tank is 2079 M cube and the diameter of its base is 21 m. Find the cost of plastering its inner surface at rupees 40 per square metre.
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Answer:
Step-by-step explanation:
2079=2 πrh
2079=2x22/7x10.5xh
2079 =66xh
h=2079/66
h=31.5
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