Question

57. 100 kg of an alloy A is mixed with 140 kg of alloy B.1f
alloy A has lead and tin in the ratio 2:3, and alloy B has
tin and copper in the ratio 4: 1, then the amount of tinin
the new alloy is:
(a) 158 kg
(6) 162 kg
(c) 170 kg
(d) 172 kg

Answer 1

Answer:

(d) 172 kg

Step-by-step explanation:

Let the metal amount (Alloy A)- x

2x + 3x = 100

5x = 100

x = 20

Tin = 20 * 3 = 60 kg

.....

Let the metal amount (Alloy B) - y

4y + 1y = 140

5y = 140

y = 28

Tin = 28 * 4 = 112 kg

Total = 112 + 60 kg = 172 kg.....