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suresh dangi

· started a discussion

· 1 Months ago

wrong answer (Question: 110890.2 )

a4 will be right answer

Question:

Directions: An alloy manufacturing company manufactures five types of aluminium alloys by using four metals, that is, aluminium, copper, zinc and tin. Study the tables given below and select the most appropriate answers.

Percentage of metals in different alloys

Alloy

Aluminium

Zinc

Tin

Copper

A1

68

13

8

11

A2

76

6

15

3

A3

64

14

10

12

A4

72

8

4

16
Prices of metals per kg

Metal

Price/kg

Aluminium

125

Zinc

250

Tin

220

Copper

400
Cost of production of alloy per tonne

Alloy

Labour cost per tonne (In Rs.)

A1

16500

A2

25000

A3

18200

A4

24400
Cost of alloy = Cost of metals used in alloy + Labour cost
Which alloy has the highest cost of metals per kg?
Options:
A) A1
B) A2
C) A3
D) A4
E) Equal for A3 and A4
Solution:

Cost of metals for 1 kg of alloy A1 = 0.68 × 125 + 0.13 × 250 + 0.08 × 220 + 0.11 × 400 = Rs.179.10

Cost of metals used for 1 kg of alloy A2 = 0.76 × 125 + 0.06 × 250 + 0.15 × 220 + 0.03 × 400 = Rs.155

Cost of metals for 1 kg of alloy A3 = 0.64 × 125 + 0.14 × 250 + 0.10 × 220 + 0.12 × 400 = Rs.185

Cost of metals for 1 kg of alloy A4 = 0.72 × 125 + 0.08 × 250 + 0.04 × 220 + 0.16 × 400 = Rs.182.80

∴ Cost of metals is the highest for alloy A3.

Knowledge Expert

· commented

· 1 Months ago

Cost of metals for 1 kg of alloy A1 = 0.68 × 125 + 0.13 × 250 + 0.08 × 220 + 0.11 × 400 = Rs.179.10

Cost of metals used for 1 kg of alloy A2 = 0.76 × 125 + 0.06 × 250 + 0.15 × 220 + 0.03 × 400 = Rs.155

Cost of metals for 1 kg of alloy A3 = 0.64 × 125 + 0.14 × 250 + 0.10 × 220 + 0.12 × 400 = Rs.185

Cost of metals for 1 kg of alloy A4 = 0.72 × 125 + 0.08 × 250 + 0.04 × 220 + 0.16 × 400 = Rs.182.80

∴ Cost of metals is the highest for alloy A3.
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