The ratio of copper and zinc in an alloy is 5:3. If the weight of the

1.	The ratio of copper and zinc in an alloy is 5:3. If the weight of the alloy is 61 gram, find the weight of the zinc in the alloy
Answer» Answer:- The WEIGHT of zinc is 22.875g. Solution:- Method 1 Let the ratio of COPPER and zinc be 5x and 3x, = 5x + 3x = 61 = 8X = 61 = x = 61/8 = x = 7.625 Now, the weight of zinc is ( 3x ) = 7.625 × 3 = 22.875g. Method 2 Let the ratio of copper and zinc be 5x and 3x ➦ 5x + 3x = 61 ➦ 8x = 61 ➦ x = 61/8 ➦ x = 7.625 Now, If we find the weight of copper, then we will ABLE to find the weight of zinc :- The weight of copper:- ➦ 7.625 × 5 ➦ 38.125 The weight of zinc = The weight of alloy - The Weight of copper Therefore, ➦ 61g - 38.125g ➦ 22.875g Now, Verification ➦ 22.875 + 38.125 = 61 ➦ 61 = 61 L.H.S = R.H.S Hence, Proved.

The ratio of copper and zinc in an alloy is 5:3. If the weight of the alloy is 61 gram, find the weight of the zinc in the alloy

Answer»

Answer:-

The WEIGHT of zinc is 22.875g.

Solution:-

Method 1

Let the ratio of COPPER and zinc be 5x and 3x,

= 5x + 3x = 61

= 8X = 61

= x = 61/8

= x = 7.625

Now, the weight of zinc is ( 3x )

= 7.625 × 3

= 22.875g.

Method 2

Let the ratio of copper and zinc be 5x and 3x

➦ 5x + 3x = 61

➦ 8x = 61

➦ x = 61/8

➦ x = 7.625

Now, If we find the weight of copper, then we will ABLE to find the weight of zinc :-

The weight of copper:-

➦ 7.625 × 5

➦ 38.125

The weight of zinc

= The weight of alloy - The Weight of copper

Therefore,

➦ 61g - 38.125g

➦ 22.875g

Now, Verification

➦ 22.875 + 38.125 = 61

➦ 61 = 61

L.H.S = R.H.S

Hence, Proved.