In $2 K g$ mixture of copper and aluminium, $30 %$ is copper. How much aluminium powder should be added to the mixture so that the quantity of copper becomes $20 %$ .

900 g m s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

800 g m s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1000 g m s

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

1200 g m s

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $1000 g m s$
Copper = $\frac{30}{100} \times 2 = 0.6$ kg
Aluminium = $(2 - 0.6)$ kg
$= 1.4$ kg
Let x kg be added to the
mixture
Now, $1.4 + x = \frac{80}{100} (2 + x)$
$140 + 100 x = 160 + 80 x$
$20 x = 20$
$x = 1$ kg
1000 g should be added to make
the quantity of copper 20%

Suggest Corrections

Similar questions

Q. In a mixture of 80 liters of milk and water, 25% of the mixture is milk. How much water should be added to the mixture so that milk becomes 20% of the mixture?

Q. An alloy of copper and bronze weight 50g. It contains 80% Copper. How much copper should be added to the alloy so that percentage of copper is increased to 90%?

In a particular type of 10 kg of alloy, the ratio Copper to Carbon is 3:2. Now, $2 k g$ of Copper is added to the mixture.
Choose the correct options below:

Q. In a

729 m l

mixture milk and water are in the ratio of

7 : 2

.. How much quantity of water should be added in the new mixture so that the ratio of milk and water becomes

7 : 3

Q. In 1 kg mixture of sand and iron, 20% is iron. How much sand should be added, so that the proportion of iron becomes 5%?

Join BYJU'S Learning Program

In 2Kg mixture of copper and aluminium, 30% is copper. How much aluminium powder should be added to the mixture so that the quantity of copper becomes 20%.

The correct option is C 1000gmsCopper = 30100×2=0.6 kgAluminium = (2−0.6) kg=1.4 kgLet x kg be added to themixtureNow, 1.4+x=80100(2+x)140+100x=160+80x20x=20x=1 kg1000 g should be added to makethe quantity of copper 20%

In $2 K g$ mixture of copper and aluminium, $30 %$ is copper. How much aluminium powder should be added to the mixture so that the quantity of copper becomes $20 %$ .

The correct option is C $1000 g m s$
Copper = $\frac{30}{100} \times 2 = 0.6$ kg
Aluminium = $(2 - 0.6)$ kg
$= 1.4$ kg
Let x kg be added to the
mixture
Now, $1.4 + x = \frac{80}{100} (2 + x)$
$140 + 100 x = 160 + 80 x$
$20 x = 20$
$x = 1$ kg
1000 g should be added to make
the quantity of copper 20%