Saili plants 4 saplings, in a row, in her garden. The distance between two adjacent saplings is 3/4 m. Find the distance between the first and the last sapling.

There are total 4 saplings.

3/4 of a metre separates two nearby saplings.

Distance between the 1st and the last sapling = 3 × 3/4 m = 9/4 m

we get

9/4 m = $2\frac{1}{4}$ m

Thus, the distance between the first and last sapling is $2\frac{1}{4}$ m.