(Q3).A ladder has rungs 25 cm apart. The rungs decrease uniformly in length from 45 cm at the bottom to 25 cm at the top. If the top and the bottom rungs are 2
1
2
m apart, what is the length of the wood required for the rungs. [Hint: Number of rungs =
250
25
+ 1]
Given: A ladder with rungs separated by a distance of 25 cm.
Total distance between the rungs = 2
1
2
m = cm
∴ Number of rungs =
250
25
+ 1 = + 1 =
Length of the bottom and top rungs = 45 cm and 25 cm