Question

21. Surbhi has Rs 112 as one rupee and five rupee coins. If the number of one rupeecoins is thrice the number of five rupee coins, then how many coins does shehave of each denomination?​

Answer 1

Translating the sentences into algebraic expression and then solve the unknown.

Define x:

Let the number of 5 rupee coins be x

Number of 1 rupee coins = 3x

Given:

Total Value of the coins = Rs 112

Solve x:

5(x) + 1(3x) = 112

5x + 3x = 112

8x = 112

x = 14

Find the number of coins

5 rupee coins = x

5 rupee coins = 14

1 rupee coins = 3x

1 rupee coins = 3(14)

1 rupee coins = 42

Answer: There are 42 one-rupee coins and 14 five-rupee coins.

Answer 2

Answer:-

there are 42 one rupees coins and 14 five rupees coins