Question

find base of triangle.area is 25 ares and height is 20 m

Answer 1

let base be Y
area of triangle=1/2×base×height

25=1/2×y×20

Y=5/2 or2.5m

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Answer 2

let the base be b m
now
area = 25
1/2 x b x 20 = 25
b = 2.5
the base of the triangle= 2.5 m