Question
An alloy consists of 38% aluminum, 32% copper, and 30%
zinc. How much aluminum should be added to 60 kg of the alloy so that the new alloy contains 50% aluminum?Solution
ATQ,
Quantity of the alloy = 60 kg
Quantity of aluminum in 60 kg alloy = (0.38 × 60) = 22.8 kg
Quantity of copper in 60 kg alloy = (0.32 × 60) = 19.2 kg
Quantity of zinc in 60 kg alloy = (0.30 × 60) = 18 kg
Let the quantity of aluminum to be added be x kg.
According to the question,
Quantity of aluminum in the new alloy = (Quantity of copper + Quantity of zinc)
(22.8 + x) = (19.2 + 18)
Or, x = 37.2 - 22.8 = 14.4
In the following question, among the four answer figures which one can be formed from the cut out pieces given below?
Find ou t the alternative figure which contains figure (X) as its part.
Choose a figure which would most closely resemble the unfolded form of Figure (Z).
Among the four answer figures, which can be formed from the cutpieces given below?
A piece of paper is folded and cut as shown below in the question figures. From the given answer figures, indicate how it will appear when opened?
...A piece of  paper is folded and cut as shown below in the question figures from the given answer figures, indicates how it will appear when unfolded? ...
Choose a figure which would most closely resemble the unfolded form of Figure (Z).
A paper is folded and cut as shown below. How will it appear when unfolded?
In the following question, among the four answer figures which one can be formed from the cut out pieces given below?
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