Answers

2016-02-20T20:41:13+05:30

let the base be=4x

height =5x

area of triangle=1/2*4x *5x

90=10x²

x²=90/10

x²=9

x=3

b=4*3=12

h=5*3=15

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2016-02-21T17:48:26+05:30
Let the base and the height be 4x and 5x.
area of a triangle=1/2*b*h
                    90=1/2*4x*5x
                    90=2x*5x
                    90=10x^2
                    90/10=x^2
                     9=x^2
                     x=3
base=4x=4*3=12m
height=5x=5*3=15m

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