9. a) Mr Ghimire spends \( \frac{7}{10} \) parts of his income every month which amoumis to Rs 28000 . (i) Find his income every month. (ii) How much does he save in a year?

Given: - Mr. Ghimire spends \( \frac{7}{10} \) parts of his income every month, which amounts to Rs 28000. Let's denote: - \( x \) as Mr. Ghimire's income every month. We know that \( \frac{7}{10} \) of his income is Rs 28000, so we can set up the equation: \[ \frac{7}{10}x = 28000 \] To find his income every month, we need to solve for \( x \). Let's solve for \( x \) using the equation above. Solve the equation by following steps: - step0: Solve for \(x\): \(\frac{7}{10}x=28000\) - step1: Multiply by the reciprocal: \(\frac{7}{10}x\times \frac{10}{7}=28000\times \frac{10}{7}\) - step2: Multiply: \(x=40000\) The solution to the equation \( \frac{7}{10}x = 28000 \) is \( x = 40000 \). So, Mr. Ghimire's income every month is Rs 40000. Now, to find out how much he saves in a year, we need to calculate the amount he saves in a month and then multiply it by 12 (the number of months in a year). Let's calculate the amount he saves in a month first. Calculate the value by following steps: - step0: Calculate: \(40000-28000\) - step1: Subtract the numbers: \(12000\) Mr. Ghimire saves Rs 12000 in a month. To find out how much he saves in a year, we multiply the monthly savings by 12 (the number of months in a year). Let's calculate the annual savings. Calculate the value by following steps: - step0: Calculate: \(12000\times 12\) - step1: Multiply the numbers: \(144000\)