There is a circular path around a sports field. Sonia takes 18 minutes to drive one round of the field, while Ravi takes 12 minutes for the same. Suppose they both start at the same point and at the same time, and go in the same direction. After how many minutes will they meet again at the starting point?
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Answered by
11
Answer:
1/18+1/12= 2+3/36=5/36×60
Answered by
25
ᴀɴsᴡᴇʀ:
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ᴛᴏ ғɪɴᴅ ᴛʜᴇ ʀᴇϙᴜɪʀᴇᴅ ɴᴜᴍʙᴇʀ ᴏғ ᴍɪɴᴜᴛᴇs
ʟᴇᴛ ᴜs ғɪɴᴅ ᴛʜᴇ ʟᴄᴍ ᴏғ 18 ᴀɴᴅ 12
ᴡᴇ ʜᴀᴠᴇ
18 => 2 × 3 × 3 = 2 × 3²
12.=> 2 × 2 × 3 = 2² × 3
ʟᴄᴍ (18,12) => 2² × 3² = 36
ᴀғᴛᴇʀ 36 ᴍɪɴᴜᴛᴇs sᴏɴɪᴀ ᴡɪʟʟ ʙᴇ ᴀᴛ ᴛʜᴇ sᴛᴀʀᴛɪɴɢ ᴘᴏɪɴᴛ ᴀғᴛᴇʀ ᴄᴏᴍᴘʟᴇᴛɪɴɢ 2 ʀᴏᴜɴᴅs ᴏғ ᴛʜᴇ ғɪᴇʟᴅ ᴀɴᴅ ʀᴀᴠɪ ᴀʟsᴏ ʙᴇ ᴀᴛ sᴀᴍᴇ ᴘᴏɪɴᴛ ᴀғᴛᴇʀ 3 ʀᴏᴜɴᴅs.
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