The Brainliest Answer!

This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Distance between the starting rung and the top most rung = 250 cm

Number of rungs in 250 cm with spacing of 25 cm = 250/25 = 10

Including the bottom most rung the total number of rungs on the ladder = 11

The length of rungs is an Arithmetic progression/series.

Sum of lengths of all 11 rungs = (1st term + last term)/2  * number of rungs
                   = (45+25)/2 * 11 = 385 cm

1 5 1