A boy spends 3/4 of his pocket money and then gives 4/5 of the remainder to his sister.If he has Rs 40 left how much did he have at first

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sorry i was wrong. here is the right answer!!!!!!!!

let the total money = x

3/4 of total money = 3/4 of x = 3x/4

remainder = x - 3x/4 = x/4

gave to his sister = 4/5 of x/4

= x/5

remainder = x/4 - x/5

= 5x - 4x/20

= x/20

according to question

remaining money = 40

x/20 = 40

x = 40 *20

x = 800/=

ans:-the total money was Rs 800 .

thanks..........

  • 6

Let the total money = 1

3/4 of his pocket money = 3/4 of 1

= 3/4

remainder = 1-3/4

= 1/4

gave to his sister = 4/5 of 1/4

= 1/5

money left = Rs40

= 40 / 1/5

= 40*5/1

= Rs 200

thanks...........

  • 1
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