The perimeters of two similar triangles ABC and PQR are 78 cm and 46.8 cm, respectively. If PQ=11.7, then the length of AB is?

दो समान त्रिभुज ABC और PQR का परिमाप क्रमश: 78 सेमी और 46.8 सेमी है। यदि PQ=11.7 है, तो AB की लम्बाई है?

19.5cm 23.4cm 24cm 20cm

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