Question 171182
The formula for the area of a triangle (abc)is:

{{{A= (1/2)* b*h}}}, where b is the base of a triangle and h is the height 

The base and height of a triangle must be perpendicular to each other, then in a right triangle height is equal to the leg of the triangle, in this case a=h 

you have given A= 250, h=5
 
Substitute and simplify:

{{{250=(1/2)*b*5 }}}


{{{250=(5/2)*b}}}

then:
b = 100

Answer: the lenght of second leg of the right triangle is 100 in