the compound ratio of 7:5 and 8:x is 84:60 find x
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ᴀɴsᴡᴇʀ
ᴄᴏᴍᴘᴏᴜɴᴅ ʀᴀᴛɪᴏ ᴏғ 7:5 ᴀɴᴅ 8:x=84:60
7×x:5×8=84:60
7x:40=84:60
ᴘʀᴏᴅᴜᴄᴛ ᴏғ ᴇxᴛʀᴇᴍᴇs = ᴘʀᴏᴅᴜᴄᴛ ᴏғ ᴍᴇᴀɴs
⇒7x×60=40×84
40×84/60 = 7x
7x=56
x=8
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