Question

Ria has Rs. 42 in the form of fifty paise and twenty five paise coins. She has twice as many twenty-five paise coins as she has fifty paise coins. How many coins of each kind?

Answer 1

Answer:

use algebra

let 50p coins =x

25 p coins =2x

amount in 50p coins =50x

Amount in 25p coins =25(2x)

ATQ

50x+25(2x)=42(100)

100x = 42(100)

x  =  42

therefore 50p coins =42

And 25p coins =2x  => 2(42) =84