No, because all sides are not congruent. The answer is B.
To find the age of tom we will use the expression 20*3 because tom is three times as old as Sam.
so the answer is 60
1) To write 0.259 as a fraction let's firstly rewrite as

2) Count the digits the dot has gone to the left. Each digit to the left means divided by ten. Like this:
3) Since it starts with a zero then it can't be a Mixed number. So it is an improper fraction. No further simplification could be done.