RP = 3.5RR = P/3.5R = 70/3.5 = Rs. 20Price of R = Price of SPrice of T is twice the price of RT = 2RT = 2 × 20 = Rs. 40Price of Q is 1.5 times that of TQ = 1.5T = 1.5 × 40 = Rs. 60.Hence, the correct answer is "Rs. 60".