Question

The ratio of weights of tin and zinc in an alloy is 2 : 5 . How much zinc is there in 31.5 g alloy ?​

Answer 1

Answer:

12.6g

Step-by-step explanation:

given,

ratio of weights=2:5

ratio of tin =2x

ratio of zinc=5x

weight of zinc given=5x=31.5g

x=31.5÷5=6.3g

weight of tin =2×6.3=12.6g

Answer 2

Answer:

let's take 3 AS 2x and zinc as 5x

2x+5x=31.5

7x=31.5

x=4.5

2x=2×4.5=9

5X=5×4.5=22.5

weight of tin is 9 gram and zinc is 22.5 gram in 31.5g alloy