In the elevator, the button for the first floor is located at a height of 1 m 20 cm from the floor.

| January 4, 2021 | education

In the elevator, the button for the first floor is located at a height of 1 m 20 cm from the floor. The button for each next floor is 10 cm higher than the previous one. To which floor can a little boy, whose height is 90 cm, reach in an elevator, if he, jumping up, can reach a height exceeding his height by 45 cm?

To solve the problem, it is necessary to find the maximum height of the boy: the boy’s growth is: 90 cm + 45 cm = 1 m 35 cm.We find which floor button is in this interval: 1.1 m 20 cm is the first floor (1 m 20 cm <1 m 35 cm) until the first floor the boy reaches 2.1 m 20 cm + 10 cm = 1 m 30 cm (1 m 30 cm <1 m 35 cm) this is less than 1 m 35 cm, respectively, until the second floor the boy reaches 3.1 m 30cm + 10cm = 1m 40cm (1m 40cm> 1m 35cm) the boy will not be able to reach the third floor. answer: the boy will be able to reach the 2nd floor.



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