Question

Aaron is building a brick wall.

The wall will need 1025 bricks.

The weight of each brick is 2.89 kg.

Aaron will pay a delivery charge if the total weight of the bricks is over 2500 kg.

Use estimation to work out if you think Aaron will need to pay the delivery charge.

Answer 1

Given : Aaron is building a brick wall.  wall will need 1025 bricks. weight of each brick is 2.89 kg . Aaron will pay a delivery charge if the total weight of the bricks is over 2500 kg.

To find :  Aaron will need to pay the delivery charge or not

Solution:

Weight of Each Brick  =  2.89  kg

Number of Bricks required  = 1025  

Weight of 1025 Bricks  = 1025  * 2.89   kg

Using estimatation 1025 * 2.89 >  1000 * 2.89

=>  1025 * 2.89 >  2890  kg

2890 > 2500

=> 1025 * 2.89 > 2500

Aaron will need to pay the delivery charge as Weight of bricks is more than 2500 kg

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Answer 2

Aaron will pay a delivery charge.

Step-by-step explanation:

Number of bricks required to build the wall = 1025 bricks

Weight of each brick = 2.89

Total weight of the required bricks = 2.89 * 1025 = 2962.25 Kg

Cut off weight for delivery charge = 2500 Kg.

We find that 2962.25 kg > 2500 Kg. So Aaron will pay a delivery charge.