Question

The details of rubber sheets got for a month by a farmer are given in the table.

Rubber (kg)	No. of days
7	3
8	4
9	5
10	6
11	?
12	4
13	3

During this month he got an average of 10 sheets per day. If so in how many days did he get 11kg per day ?

Answer 1

Rubber (kg)	Days	Total weights (kg)
7	3	7 × 3 = 21
8	4	8 × 4 = 32
9	5	9 × 5 = 45
10	6	10 × 6 = 60
11	X	11 × x = 11x
12	4	12 × 4 = 48
13	3	13 × 3 = 39
Total	25 + x	245 + 11x

Let ‘x’ be the number of days in which he got 11 kg rubber sheet.

∴ He got 11 kgs of sheets for 5 days.