"A closed metallic cylindrical box is 1.25 m high and its base radius is 35 m. If the sheet
Channel: Doubtnut
Date: 2020-04-05

"A closed metallic
 cylindrical box is 1.25 m high and its base radius is 35 m. If the sheet
 metal costs Rs 80 per m2, the cost of the material used in the box
 is
(a) Rs
 281.60 (b) Rs 290 (c) Rs 340.50 (d) Rs 500"