Mensuration Practice Test 8

Question : 5 of 40

Marks: +1, -0

Find the area of a triangle whose sides are 40 m, 38 m and 60 m respectively.

Solution:

a = 40, b = 38, c = 60
S =

{a+b+c}/2

{40+38+60}/2

{138}/2

= 69
A =

πr^2

√{s(s-a)(s-b)(s-c)}

√{69(69-40)(69-38)(69-60)}

√{69×29×31×9}

√{3×23×29×31×3×3}

3√{62031}

= 3 249.06 = 747.18 sq.m

Go to Question:

Prev Question

Next Question