Question

the slant height and the diameter of a conical tomb are 25 cm and 14 cm respectively. Find the cost of constructing it at Rs 25 per cubic meter and cost of white washing it's curved surface at Rs 16 per square meter.
pls give the correct answer​

Answer 1

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Answer 2

Cᴜʀᴠᴇᴅ sᴜʀғᴀᴄᴇ ᴀʀᴇᴀ ᴏғ ᴀ ᴄᴏɴᴇ =πʀʟ, ᴡʜᴇʀᴇ ʀ ɪs ᴛʜᴇ ʀᴀᴅɪᴜs ᴏғ ᴛʜᴇ ᴄᴏɴᴇ ᴀɴᴅ ʟ ɪs ᴛʜᴇ sʟᴀɴᴛ ʜᴇɪɢʜᴛ.

Rᴀᴅɪᴜs ᴏғ ᴛʜᴇ ᴛᴏᴍʙ =

.

=7ᴍ

Hᴇɴᴄᴇ, CSA ᴏғ ᴛʜɪs ᴄᴏɴɪᴄᴀʟ ᴛᴏᴍʙ , =

.

×7×25=550  sϙ. ᴍ.

Cᴏsᴛ ᴏғ ᴡʜɪᴛᴇ ᴡᴀsʜɪɴɢ ᴛʜᴇ ᴛᴏᴍʙ ᴀᴛ

Rs. 210 ᴘᴇʀ 

.

=

.

×550= Rs. 1155