If a brick weighs 4 kgs and a half brick. What is the weight of 1 and1/2 bricks?

Question

Please could you explain the formula thank you maths wiz!

Its not 1/2 as in 1.5
Its 4kgs and half a brick.....

Answer 1

If 1 brick = 4kgs and
1/2 brick = 2kgs

X=4+(1/2x4)

1 brick = 6kgs.

1.5 bricks = 9kgs.

Answer 2

Let B = weight of brick. Assume everything is in kg. then
B = 4 + .5 B --> simple expression. you end up with .5B = 4 kg. But 1.5B = 3 * .5 B = 3*4 = 12 kg.

The trick to getting the answer has two parts - the first part is to correctly translate into algebra. Once you understand that the full weight is expressed as a value PLUS a fraction of the full weight (the 'half brick'), then it becomes a simple translation to make. Note that, once you 'Let B = weight of brick', you can then make a direct translation. A brick weighs --> B. 4 kg --. 4. 'half brick' --> .5 B and then it's a question of where to put the equals sign.
Instead of 'a brick weighs', read it as... the weight of a brick is... where you find 'is' replace with '=' and you're done. It's in the translation. [I only solved and gave the answer so that you could know I gave you the correct solution - what you asked for was to explain HOW to write the equation!]

The second is to understand WHAT the question is actually asking. Many people would answer the question with 8 kg, the weight of the brick. But that would be the right answer to the wrong question.

(and, while expressing weight in Newtons is technically correct, I suspect that, given the nature of the question, the English being used is not quite so precise.)

Answer 3

Clearly, the 4 Kg must correspond to the other half of the brick. So half brick weighs 4 kg. And 1 1/2 brick must weight 3 * 4kg = 12 kg.

Ok, let see if we can translate this in equation. Let W be
the weight of a brick.

W= 4 Kg + 1/2 W
1/2 W = 4 kg
3 x 1/2 W = 12 kg.

Answer 4

Am I being silly here?
Let weight of brick = x kg
Weight of 1/2 brick = x/2 kg
Weight of 1 brick = 4 + x/2
Weight of 1/2 a brick = 2 + x/4
Weight of 1½ bricks = 6 + 3x/4
= 6 kg + (3/4) of a brick.

Answer 5

Let x = weight of 1 1/2 bricks.

Solution by ratio and proportion: the product of the means = the product of the extremes.

1 brick : 4 kg = 1 1/2 bricks : x
1 brick * x = 1 1/2 bricks * 4 kg
x = 6 kg

Answer 6

If a brick has a mass of 4 kg and 1/2 brick, then 1/2 brick has a mass of 4 kg, and 1 1/2 bricks have a mass of 12 kg, and a weight of 108.80 N

Answer 7

That means 1 brick would weigh 16 pounds so it means 1 and 1/2 would weigh 18 pounds because 1 kg weighs 4 pounds.

Answer 8

if x is the weight of each brick then
x= x/2 + 4 hence x=8 kgs...
the net weight of 11/2 brick is 12 kgs.

Answer 9

I hope I have this right (I could be confused, if I am please let me know!)...

Let's call 1 brick B. The weight of the brick is 4kgs and a half brick, or 4kg +0.5B. We now have an equation:

B = 4kg + 0.5B.

Solving for B:
B - 0.5B = 4kg + 0.5B - 0.5B (Subtract 0.5B on both sides.)
0.5B/0.5 = 4kg/0.5 (Divide both sides by 0.5- this is the same as multplying both sides by 2.)
B = 8kg

That is the weight of 1 brick. The question asks for one and one half brick, which should be 1.5B. You just multiply whatever you got for B (in this case, 8kg) by 1.5, and you get your answer (1.5 x B = 1.5 x 8kg = 12 kg).

Hope that helps!

Answer 10

1 brick = 4 kgs
1.5 brick = 4*1.5 kgs = 6 kgs


this is one heavy brick ;)