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Side of triangles are in the …

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Side of triangles are in the ratio 3:5:7 and its perimeter is 300 cm. Find its area??

    • Posted by Kundan Sharma 5 years, 2 months ago

    CBSE > Class 09 > Mathematics
    • 2 answers

    Shriya Jain 5 years, 2 months ago

    Let sides be 3x,5x,7x 3x+5x+7x=perimeter 15x=300 x=20 Sides=3*20=60 5*20=100 7*20=140 Semi perimeter=300/2 =150 Area of triangle= √s(s-a)(s-b)(s-c) √150(150-60)(150-100)(150-140) √150*90*50*10 √10000*15*9*5*1 100*3√5*3*5 300*5√3 1500√3cm2

    0Thank You

    King Tanishq 5 years, 2 months ago

    3x+5x+7x=300 15x=300 X=300/15 X=20 3x=3*20=60 5x=5*20=100 7x=7*20=140 Then find area by herons formula

    1Thank You

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