Respuesta :

15=1/2 x base x height
15=1/2xbx3
15=3/2xb

This is the formula!!
We know, Area = 1/2 * base * height

Substitute your given values into the expression:
15 = 1/2 * b * 3
15 * 2 = 3 * b
b = 30/3
b = 10 m

In short, Your Answer would be Option B

Hope this helps!