Choose the correct option for DPQR.
APQ - QR > PR
BPQ + QR < PR
CPQ - QR < PR
DPQ + PR < QR
No figure is given in the question.
Chinki can cycle from point A to point B and return to point A in 10 minutes. She can cycle there and walk back in 20 minutes. It will take ____ mins for her to walk there and walk back.