Question

Average weight of students of a class of 30 is 60kg. If weight of teacher is included, the average weight increase by 400 gram. Find the weight of Teacher.​

Answer 1

Answer:

The average weight of 29 students is 40kg.

Total weight=40*29=1160

Now as the teacher joins total =29+1=30

And the average rises up by 500grams

So new total weight=30*40.5=1215

Weight of teacher = Weight of 30(teacer+students)-Weight of 29students

i.e 1215–1160=55

Answer 2

WEIGHT of teacher = 72.4 kg

Step-by-step explanation:

GIVEN

• No. of students = 30
• Average of 30 = 60 Kg

SOLUTION

• Total Weight of class = 30×60 = 1800 kg

• Avg increase with addition of teacher = 0.4 Kg

• Let the Weight of Teacher be x

• 1800 + x /31 = 60+0.4
• 1800+x = 60.4 × 31
• x = 72.4 kg