Question

B)
B
3) The average weight of eight boxes is increased by
2.5 kg when some goods are added to one of the boxes.
The weight of goods added to this box is
С​

Answer 1

Answer:

20

Step-by-step explanation:

If we look at the question weight increased is 2.5 kg per box and with eight boxes it means 8*2.5 is equal to 20

Answer 2

Given:

Average weight of the 8 boxes gets increased by 2.5 kg when weight of one of the boxes is increased.

To Find:

Increased weight of the box.

Solution:

Let the avg weight of 8 boxes=$x$

∴ Total weight of 8 boxes = $8x$

After adding the weight of one of the boxes, new average= $x+2.5$

∴New weight  =$8(x+2.5)$

                        =$8x+20$

∴ weight added = new weight- old weight

                           =$8x+20-8x$

                           =$20$

Hence the weight added is 20 kg.