Giving brainliest to whoever helps me.

w = 2.5 cm

Step-by-step explanation:

The area (A) of the triangle is calculated as

A = bh ( b is the base and h the height )

Here b = 5 and h = 6, thus

A = 0.5 × 5 × 6 = 15 cm²

Thus the area of the rectangle is 15 cm²

A = lw ( l is the length and w the width )

Here l = 6 and w is to be found

6w = 15 ( divide both sides by 6 )

w = 2.5 cm