Question

The students of a school decided to beautify the school on the Annual Day by. fixing colourful flags on the straight passage of the school. They have 27 flags to be fixed at intervals of every 2 m. The flags are stored at the position of the middle most flag. Ruchi was given the responsibility of placing the flags. Ruchi kept her books where the flags were stored. She could carry only one flag at a time. How much distance did she cover in completing this job and returning back to collect her books? What is the maximum distance she travelled carrying a flag?

Answer 1

Total distance covered by Ruchi.

$S=2\left(4+8+12+....to13term\right)$m

$=2+\left[\frac{13}{2}\left|2\times 4+\left(13-1\right)\times 4\right|\right]$

$=2+\left[\frac{13}{2}\left|8+12\times 4\right|\right]$

$=2+\left[\frac{13}{2}\left(8+48\right)\right]$

$=2+\left[\frac{13}{2}\times 56\right]$ (Cancle $56$ by $2$ we get $28$)

$=2+\left[13\times 28\right]$

Hence,

we get.

$728$