Bela has ₹100 for pocket money. She spends ₹5 every day. What amount will be left Class 9

Bela has ₹100 for pocket money. She spends ₹5 every day. What amount will be left Class 9

Question 1.

Bela has ₹100 for pocket money. She spends ₹5 every day. Class 9

What amount will be left on the 15^th day? How many days will it take for the entire amount to be spent?

Answer:

Amount left with Bela on the n^th day = ₹ (100 - 5n).

Substituting n = 15 in 100 - 5n, we get

100 - 5 × 15 = 100 - 75 = 25

∴ The amount left on the 15^th day will be ₹25.

ii. The entire amount is spent when the amount left = 0

∴ 100 - 5n = 0

∴ 5n = 100

∴ n = 20

∴ The entire amount will be spent in 20 days.