Question

41. A certain number of 10 paise coins and thrice the number of 20 paise coins add up to 21. If so, the number of 20 paise coins is​

Answer 1

Answer:

Let a common multiple be x

As per given information

total amount = Rs 90

=7×10×x+20×4×x+3×25×x

=70x+80x+75x

=225x paise

∴9000=225x... ∵Rs90=(90×100) paise

∴x=

225

9000

=40

∴ No of 25 paise =3x=

225

3×9000

=3×40

=120