The average age of 30 students in a class is 10years. If teacher's age is also included then average increases 1year then find the teacher's age?	Choose the most appropriate option
A) 59  B) 55  C) 61  D) 41  E) 36
Total age of 50 students = 30*10= 
<gadget id="calculator">30*10</gadget>
<output>300</output>
300   Total age of 51 persons= 31*11= 
<gadget id="calculator">31*11</gadget>
<output>341</output>
341   Age of teacher= 341-300= 
<gadget id="calculator">341-300</gadget>
<output>41</output>
41years   Answer is 41
<result>D</result>
The average age of 30 students in a class is 10years. If teacher's age is also included then average increases 1year then find the teacher's age?