Ram donated 4% of his income to a charity and deposited 10% of the rest in a Bank. If now he has Rs. 8640 left with him, then his income is
let the income be 100
Ram donated 4% of his income to a charity = $$ \frac{4}{100} \times 100 = 4 $$
remaining = 96
deposited 10% of the rest in a Bank = $$ \frac{10}{100} \times 96 = 9.6 $$
saving = 100 - 13.6 = 86.4
86.4===100Â
1Â ==== $$ \frac{100}{86.4} $$
 = $$ \frac{100}{86.4} \times 8640 = 10000 $$Â
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