"A picture is worth a thousand words"
This is very basic maths! If you get stumped by a question like this, ALWAYS sketch it out!
Mark the c of g as 'X' cm from the nose, or in front of the main wheels if you prefer.
Note down the relevant loads on front and main bogies ie 1450/24000.
Work out the moments around your 'notional' c of g, 'X'.
Since the a/c does not tip on its tail, they must be equal
With X marked from nose:-
1450 x X=(10-X) x 24000 (10 is distance between legs)
Solve for X (metres)