Question

Высота пятиэтажного дома составляет 15 м, а высота дуба 1 м 5 дм. Через сколько лет дуб достигнет 4 этажа, если средний прирост дуба за 1 год составляет 5 дм?

Answer 1

1м = 10дм

15м/5*4=12м

12м-1м5дм=10м5дм

10м5дм=105дм

105дм/5дм=21год

 

Answer 2

Calculation of the Oak Tree's Growth

To calculate the number of years it will take for the oak tree to reach the height of the fourth floor, we need to determine the total height of the oak tree and then divide it by the average annual growth rate.

Given: - Height of the five-story building: 15 meters - Height of the oak tree: 1 meter 5 decimeters (1.5 meters) - Average annual growth rate of the oak tree: 5 decimeters (0.5 meters)

To find the total height of the oak tree, we can subtract the height of the building from the height of the oak tree: Total height of the oak tree = Height of the oak tree - Height of the building

Total height of the oak tree = 1.5 meters - 15 meters = -13.5 meters

Since the total height of the oak tree is negative, it means that the oak tree is shorter than the building. Therefore, the oak tree will not reach the height of the fourth floor.

Please note that the given information may not be accurate or complete, as the height of the oak tree is shorter than the building.