Question

A mason needs to lay 680 bricks to build a wall. After laying 21/34 of the total bricks, he takes a break.

How many bricks remain to be laid to finish the wall? step by step​

Answer 1

Answer:

260 bricks remain to be laid to finish the wall.

Step-by-step explanation:

Given:

• A mason needs to lay 680 bricks to build a wall.
• After laying 21/34 of the total bricks, he takes a break.

To find:

• How many bricks remain to be laid to finish the wall?

Solution:

Here, we are provided that a mason needs to lay total 680 bricks to build a wall and out of 680, he laid just 21/34 bricks and after that take a rest. So, here in this question, we will use simple unitary method to find the total number of bricks laid by him and after that we will subtract the number of bricks laid by him from the total number of bricks required to build a wall to find the number of bricks remain to be laid to finish the wall.

Let's find out...

We know that he laid 21/34 of the total bricks.

• = 21/34 of the total bricks
• = 21/34 of 680
• = 21/34 × 680
• = 21 × 20
• = 420

∴ 420 bricks are already laid by a mason.

Finally,

• Number of bricks remain to be laid = Total number of bricks required - Number of bricks already are laid

• Number of bricks remain to be laid = 680 - 420

• Number of bricks remain to be laid = 260

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