# mathWatch

#1
An alloy is made from tin and copper. The ratio of weight tin: weight copper is 1: 4. How much tin is needed to make 20g alloy?
This is a question I was asked in a quiz and I still don't know the answer.
Any help would be appreciated ASAP.
0
4 weeks ago
#2
20g in 1:4 so you divide 20 by five (ratio splits the 20 in 5) which is equal to 4 per "1" of ratio.

You will need 1x4 = 4g for tin
4x4 = 16g for copper.

I hope that this makes sense.
1
#3
(Original post by Crow_M)
20g in 1:4 so you divide 20 by five (ratio splits the 20 in 5) which is equal to 4 per "1" of ratio.

You will need 1x4 = 4g for tin
4x4 = 16g for copper.

I hope that this makes sense.
Crow_M thank you so much for your help
1
X

new posts
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### University open days

• Edge Hill University
Mon, 18 Feb '19
• University of the Arts London
MA Innovation Management Open Day Postgraduate
Mon, 18 Feb '19
• University of Roehampton
Department of Media, Culture and Language; School of Education; Business School Undergraduate
Tue, 19 Feb '19

### Poll

Join the discussion

#### Do you give blood?

Yes (38)
10.03%
I used to but I don't now (12)
3.17%
No, but I want to start (136)
35.88%
No, I am unable to (86)
22.69%
No, I chose not to (107)
28.23%