The number of 5 letter words formed using the letters of DELHI begin and end with consonant with repetition is

In the word DELHI

Consonants = {D, L, H},

 Consider 5 places

Fill the first and last places with consonants D, L, H in 3 ways. Each of the middle 3 places can be filled with D, E, L, H, I in 5 ways.

Total no. of permutations = 3x5x5x5x3=5³x3²

                                                                           = 125x9=1125