 
<translate> Ọnụ ọgụgụ afọ ụmụ akwụkwọ bụ 14X10 = 140 Afọ Ọnụ ọgụgụ afọ nke onye nkụzi = 15X (10+1) = 165 Ya mere, afọ onye nkuzi bụ 165-140 = 25 Yrs E nwere ụzọ mkpirisi maka ụdị nsogbu ndị a Afọ onye nkuzi bụ 10+(15X1) = 25 Afọ Ya mere azịza ya bụ (E). <eng> Total age of students is 14X10 = 140 Years
Total age inclusive of teacher = 15X (10+1) = 165
So, Teacher's age is 165-140 = 25 Yrs
There is a shortcut for these type of problems
Teacher's age is 10+(15X1) = 25 Years So the answer is (E). 