Into a cyinder arong its es21 m and14 m respectively. Find the cost of

1.	Into a cyinder arong its es21 m and14 m respectively. Find the cost of renovating the inner curved surface acurved surface at the rate of 3 25 per m.11. A cylindrical well is 21 m deep. Its outer and inner diameters are
Answer» inner C.S.A =2×(22/7) ×(14/2)×21=924m^2outer C.S.A=2×(22/7)×(21/2)×21=1386m^2total area=1386+924=2310m^2total cost=2310×25=Rs57750 wrong answer.answer is 57750

Into a cyinder arong its es21 m and14 m respectively. Find the cost of renovating the inner curved surface acurved surface at the rate of 3 25 per m.11. A cylindrical well is 21 m deep. Its outer and inner diameters are

Answer»

inner C.S.A =2×(22/7) ×(14/2)×21=924m^2outer C.S.A=2×(22/7)×(21/2)×21=1386m^2total area=1386+924=2310m^2total cost=2310×25=Rs57750

wrong answer.answer is 57750