The average age of 30 boys in a class is 16 years The average of the ages of the boys and the teacher is 17 years The age of teacher is? avg of 30 is 16=30*16=480 avg of 30 and 1 teacher is 17=31*17=527 Save then age of teacher is 527-480=47... 2012mm is the average rainfall of mumbai for last 13 years.
Types of Lumber: Softwood and Hardwood. There are two types of lumber: softwoods and hardwoods. Softwood lumber comes from conifer trees like pine, fir, spruce, and cedar. These woods get their classification for a reason; they can be easily dented with just your fingernail.
Dimensional lumber is lumber that is cut to standardized width and depth, specified in inches. Carpenters extensively use dimensional lumber in framing wooden buildings. Common sizes include 2Ã4 (pictured) (also two-by-four and other variants, such as four-by-two in Australia, New Zealand, and the UK), 2Ã6, and 4Ã4.