A garden walkway is built by arranging rectangular slabs end-to-end so that their…

MATHEMATICS · Subjective · CBSE · Mathematics · Arithmetic Progressions · Arithmetic Progressions

Problem

A garden walkway is built by arranging

20

rectangular slabs end-to-end so that their lengths form an arithmetic progression. The total length of the walkway is

15\,\text{m}

and the last slab is

1.2\,\text{m}

long. (i) Calculate the length of the first slab. (ii) Determine the increase in length between successive slabs. (iii) How many of the

20

slabs have a length of at least

1\,\text{m}