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.
Douglas fir, hemlock, and spruce are the most common types of wood used for structural lumber. Of these materials, Douglas fir is moderately resistant to termites, whereas the other two are not.Remember that wood which is not naturally resistant to termites can be treated to make it resistant to termites.ouglas fir, hemlock, and spruce are the most common types of wood used for structural lumber. Of these materials, Douglas fir is moderately resistant to termites, whereas the other two are not.