# Find The Distance Between Their Top ? If

Two poles of height 7 m and 12 m stand on a plane ground. If the distance between their feet is 12, the distance between their top will be

- 13 m
- 19 m
- 17 m
- 15 m

**Answer: (1) 13 m**

**Explanation:-**

Let the distance between their top will be X m.

In right triangle A D E

AE^{2} = DE^{2} + AD^{2} (By Pythagoras theorem)

Then, X^{2} = 5^{2} + 12^{2}

X^{2} = 25 + 144

X^{2} = 169

Square root on both side,

X = 13 m

Then, the distance between their top will be 13 m.

Hence, the answer is (1) 13 m.