Question

the ratio of tinc and zinc in an alloy is 3:4 in 21 gm find the quantity of tin and zinc

Answer 1

Let tin be 3x and zinc be 4x
Therefore we have;
3x+4x=21
7x=21
x=3

Answer 2

Answer:

Let the tin be 3x and zinc be 4x

Therefore we have

3x+4x=21

7x=21x

x=21÷7

x= 3