The average weight of 18 boxes in a boat is increased by 2.5kg when one of the boxes weighing 75kg is replaced by a new box. The weight (in kg) of the new box is:
- A108
- B120
- C150
- D97
Solution & Step-by-step Explanation
Number of boxes = 18
Increase in average weight = 2.5kg
Weight of replaced box = 75kg
Weight of new box=Weight of replaced box+(Total boxes×Increase in average)
Weight of new box=75+(18×2.5)
Weight of new box=75+45=120kg
Increase in average weight = 2.5kg
Weight of replaced box = 75kg
Weight of new box=Weight of replaced box+(Total boxes×Increase in average)
Weight of new box=75+(18×2.5)
Weight of new box=75+45=120kg