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If ? ABC similar to ? PQR, ar(? ABC):ar(? PQR) =9:4,AB=18cm and BC=15cm,then find the value of QR

Posted by Pal Kamboj 5 years, 8 months ago

CBSE > Class 10 > Mathematics

5 answers

Pal Kamboj 6 years, 10 months ago

10 cm

Mehak Rathore 6 years, 10 months ago

In this we have used thereom the ratio of ares of 2 similar is equal to the square of there corresponding side

Mehak Rathore 6 years, 10 months ago

Ar?ABC\Ar?PQR = 9/4 9/4=(15^2/x^2) 9*225=4*x^2 2025= 4*x^2 2025/4=x^2 506.25=x^2 22.5=x So QR =22.5

Harsha Asiwal 6 years, 10 months ago

Qr is 10

Puja Sahoo? 6 years, 10 months ago

10cm

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