Question

Priya earned rupees 15000 in the first month thereafter her salary increase by Rupees 1500 per year her expenses are rupees 13000 during the first year and the expenses increased by rupees 900 per year how long will it take for her to save rupees 20000 per month​

Answer 1

Answer:

30 months

Step-by-step explanation:

Taking every data monthly

Priya earning for first month = Rs 15000

Priya Expenses for 1st month = Rs 13000

Priya Saving for 1 st month = 15000 - 13000 = Rs 2000

Salary increased in subsequent month = Rs 1500

Expenses increased in subsequent month = Rs 900

Saving increased in Subsequent month = 1500 - 900 = Rs 600

Saving for first month = a = rs 2000

Saving increased in subsequent month = d = Rs 600

Saving in nth Month = a + (n-1)d

= 2000 + (n-1)* 600

= 2000 + 600n - 600

= 600n + 1400

600n + 1400 = 20000

=> 600n = 18600

=> n = 31

31st months her saving would b Rs 20000 per month

so it will take 30 months