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#### Question

In Fig. 1, QR is a common tangent to the given circles, touching externally at the point T. The tangent at T meets QR at P. If PT = 3.8 cm, then the length of QR (in cm) is :

(A) 3.8

(B) 7.6

(C) 5.7

(D) 1.9

#### Solution

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