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.
Or read below to understand some of the different characteristics of wood types before starting your project. You may have heard the term lumber in reference to wood used for building. Lumber simply refers to wood to be used for construction work. A lumber yard is where lumber and wood products for construction are sold. There are two common types of wood: hardwoods and softwoods. Hardwoods. Hardwoods come from deciduous trees. Deciduous trees are trees that shed their leaves. Hardwoods tend to be more expensive and include mahogany, cherry, maple and oak. Hardwoods are sold by the board foot, which is defined as a square foot of rough lumber that is 1 inch thick.