al 13. The perimete- of a triangular field is 144m and the ratio of it

1.	al 13. The perimete- of a triangular field is 144m and the ratio of its sides is3:4:5. What is the area of the field?(A) 864 m2(C) 824m2 (D) 486 m2(B) 468 m2
Answer» Perimeter=144Let sides be 3x,4x,5x3x+4x+5x=14412x=144x=144/12=12 Sides are 36,48,60 S=144/2=72 Area =√(72(72-36)(72-48)(72-60) √(72(36)(24)(12) √(6626612212 =66122 =864m² Option a is correct Hit like button if this is helpful

al 13. The perimete- of a triangular field is 144m and the ratio of its sides is3:4:5. What is the area of the field?(A) 864 m2(C) 824m2 (D) 486 m2(B) 468 m2

Answer»

Perimeter=144Let sides be 3x,4x,5x3x+4x+5x=14412x=144x=144/12=12

Sides are 36,48,60

S=144/2=72

Area =√(72(72-36)(72-48)(72-60)

√(72(36)(24)(12)

√(6*6*2*6*6*12*2*12

=6*6*12*2

=864m²

Option a is correct

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