Question

47. The average weight of 45 sacks kept in a truck is 36 kg. If 1 new sack of some
weight is put in the truck, then the average weight of all the sacks increases by
2 kg. Find the weight in kilograms of the sack which was put later.

(1) 90
(2)72
(3) 162
(4) 128​

Answer 1

Answer:

128

Step-by-step explanation:

(36 + 2) × (45 + 1) - (36 × 45)

= (38 × 46) - (36 × 45)

= 1748 - 1620

= 128

Answer 2

Answer:

128

Step-by-step explanation:

[tex]average weight = \frac{sum of sack}{number of sack}\\ 36kg = \frac{sum of sack}{45}\\ sum of sack = 36*45\\ sum of sack = 1620kg\\ \\ after adding one more sacke to it \\ equation become\\ 36kg+2kg = \frac{sum of sack+ x}{45+1}\\ 38kg = \frac{1620+x}{46}\\ 38*46= 1620+x\\ 1620+x= 1748\\ x= 128[/tex]