Question

The ratio of weights of copper and zinc in brass is 13:7 . Find the weight of zinc in a brass utensils weighing 700 gm

Answer 1

Let the weighs of the copper and zinc be 13x and 7x
Also, the total weight is 700gm

Therefore, 13x + 7x = 700
20x = 700
x = 700 / 20
x = 70/2
x = 35
Substitute x = 35 in 13x and 7x
13x = 13×35 = 455
7x = 7×35 = 255

ANS: The weight of zinc is 255gm.

Answer 2

Answer:

Given that the ratio of weights of copper and zinc in brass is 13: 7.

So, let the weight of the copper in brass be 13x

And the weight of zinc in brass be 7x

Now, from the given information we have

Weight of brass = 700 gm

⇒ Weight of copper in brass + weight of zinc in brass = 700 gm

13x + 7x = 700

20x = 700

x = 700/20

x = 35

Therefore, the wight of zinc in brass = 7 x 35 = 245 gm.