On 2/13/2016 12:42 PM, Mark Lloyd wrote:
On 02/12/2016 10:28 PM, wrote:

[snip]

150 meters, by the way, is well over 150 feet. ( like about 165)


A meter is about 39 inches (more than 3 feet). 150 meters is about 488 feet.

39.37, IIRC. Multiply by 3 and add ~10% of itself:

150*3=450
10%*450=45
450+45=495ft

check:
150*39.37/12=492.125

i.e., less than 1% error