In the month of April, Rahul’s average expenditure for the first 10 days was Rs 800 per day. If his average expenditure for the next 10 day… — Answer & Discussion

In the month of April, Rahul’s average expenditure for the first 10 days was Rs 800 per day. If his average expenditure for the next 10 days decreases by Rs 25 after every 10 days and he earns Rs 25,000 per month. Calculate his savings in the month of April.

ARs 1500
BRs 2000
CRs 1850
DRs 1950

Answer not set

Join the discussion Report an error

Discussion 1

CCommunity05 Jun 2019

Average expenditure of days 1 to 10 = Rs 800

Total expenditure for days 1 to 10 = Rs 800 × 10 = 8000

⇒ Total expenditure for days 11 to 20 = Rs (800 – 25) × 10

= Rs 775 × 10

= Rs 7750

⇒ Total expenditure for days 21 to 30 = Rs (775 – 25) × 10

= Rs. 750 × 10

= Rs. 7500

∴ Total expenditure = Rs (7500 + 7750 + 8000)

= Rs. 23250

Now, we know that,

⇒ Savings = Income – Expenditure

= Rs 25000 – Rs 23250

= Rs 1750