On the summit of a mountain, rising 78415m. above sea level, is a tower of height 38125m. On the roof of this tower is a lightning rod with a height of 345m. What is the height above sea of the very top of the lightning rod?

1 Answer
Dec 6, 2017

826125m

Explanation:

Simply add all the heights:

78415+38125+345

First add the whole numbers without the fractions:

784+38+3=825

Add the fractions: 15+45=1
1+125=1125

825+1125=826125m