Question

Riya save 20% of her monthly salary
If she save 15000 every month
What is her monthly salary​

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