∆ABC is similar to ∆PQR. If ratio of perimeters of ∆AB

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∆ABC is similar to ∆PQR. If ratio of perimeters of ∆ABC and ∆PQR is 1:2 and if PQ = 10 cm then what is the length of AB (in cm)?

[2017 SSC CGL 20 AUG Shift-1]

A 5

B 20

C 25

D 15