GATE Computer Science (CS) 2016 Shift 2 Solved Paper

Suppose the functions F and G can be computed in 5 and 3 nanoseconds by functional units U_F and U_G, respectively. Given two instances of U_F and two instances of U_G, it is required to implement the computation F(G(X_i)) for 1 ≤ I ≤ 10. Ignoring all other delays, the minimum time required to complete this computation is ______ nanoseconds.