एक आदमी की आय 7:4 बड़ती है उसकी पूर्व आय 6400 था तो नई आय ?
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let the ratio be 7x and 4x
as we know 4x=6400
x=6400/4
x=1600
so,7x= 7*1600
= 11200
so the new salary of man is 11200
hope it will help you ^_^ ^_^
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