Answer Posted / shivaray p jan

let us consider his salary as 'X'

his previous salary after deductings 10% tax was '0.9X'
his present salary after deducting 15% tax with 10%
increments is '0.85*1.1X'

so equtuation for total gain is

(0.85*1.1X)-(0.9X)=350
0.935X-.9X=350

X=10000, Ans is 10000

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