Question

When loaded with bricks, a lorry has a mass of 11 600 kg. If the mass of the bricks is three times that of the empty lorry, find the mass of the bricks,​

Answer 1

Answer:

8,700

Step-by-step explanation:

11600 / 4 = 2900  2900 x 3 = 8700

Answer 2

Answer:

Let the mass of lorry be $x$

Then, mass of bricks = 3$x$  (it is given that mass of bricks = 3times mass of lorry)

Sum of their masses = $3x + x = 4x$

Also, their sum = 11600 kg (given in question)

We conclude that $4x = 11600 kg\\x = 11600 kg$÷ $4$

$x = 2900 kg$

So mass of lorry = 2900 kg

mass of bricks = 3 times mass of lorry = 2900 kg × 3

= 8700 kg

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