the internal and external diameters of a hemisphere are 20 and 28 cm. find cost of painting the vessel all over at 14 paise per cm square
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int.radius=10cm,
ext.radius=14cm,
cost=14/100Rs,
now,total surface area,
π(3R^+r^);
22/7(3*14*14 + 10*10);
22/7(3*169+100);
22/7(507+100);
22/7(607);
now,
cost=22/7*607*(14/100);
on solving.we get,
cost =RS267.08;
hope answer helps you...
please mark as brainliest... plzzz
ext.radius=14cm,
cost=14/100Rs,
now,total surface area,
π(3R^+r^);
22/7(3*14*14 + 10*10);
22/7(3*169+100);
22/7(507+100);
22/7(607);
now,
cost=22/7*607*(14/100);
on solving.we get,
cost =RS267.08;
hope answer helps you...
please mark as brainliest... plzzz
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