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A boyfriend 3 by 4 of his pocket money and then 4 by 5 of remaining is given to her sister if he has rupees 40 left but did he gave he have at first |
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Answer» LET initial money be 'X' After first spending , money left = X - 3/4*X = 1/4*X after giving money to his sister , money left is = 1/4*X - 4/5 * 1/4 * X = 0.25X - 0.2X = 0.05 X by DATA it's EQUAL to 40 therefore , 0.05X = 40 X= 40/0.05 X= 800 initial AMOUNT he had was 800 |
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