The cost to point a sphere made of iron sheet is Rs1540 at the rate of rs2. 50 per sq. cm. Then the diameter of the sphere is?
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Step-by-step explanation:
SA of 4πr²
now SA =
1540/2.50
= 616cm²
4πr²=616
r²=616×7/4×22
r²=49
r=7cm
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Answer:
have a good day ahead bro
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