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Mahesh Sandeboina

· started a discussion

· 1 Months ago

question is wrong (Question: 113317.0 )

it should be given difference between age of the boy and teacher

Question:

Average age of a teacher and three students is 20 years. If all the three boys are of same age and the difference between the age of the boy and the teacher is 20 years. Then the age of the teacher is equal to. 

Options:
A) 25 years
B) 30 years
C) 35 years
D) 45 years
Solution:
Ans: (c) Let the age of students be x and that of teacher be y then according to given condition we have

3x + y = 4 × 20

i.e., 3x + y = 80 ............. (i)

and y - x = 20 ...............(ii)

\(\therefore\) Now solving (i) and (ii), we get x = 15

y = 20 + 15

y = 35 years

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