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प्रश्न
Alex spends 20% of his income on food items and 12% on conveyance. If for the month of June 2010, he spent ~ 900 on conveyance, find his expenditure on food items during he same month.
उत्तर
Let Alex spend ₹ x on food items :
∴ 20 : x = 12 : 900
∴ `20/"x" = 12/900`
`therefore "x"/20 = 900/12`
`therefore "x" = (900 xx 20)/12`
∴ x = 1500
∴ Alex's expenditure on food i~ems during June 2010 is~ 1500.
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