Question

3.
find
Cost
01. The cost of (one) 1
cost of (one) 1 eraser is rupees
of 29 such erasers.
(Do not use the method of repeated addition) )​

Answer 1

Step-by-step explanation:

Let x and y be the cost of 1 pencil and 1 eraser respectively.

According to the question-

x+3y=10.....(1)

4x+6y=28

⇒2x+3y=14.....(2)

Subtracting equation (1) from (2), e have

(2x+3y)−(x+3y)=14−10

2x+3y−x−3y=4

x=4

Subsituting the value of x in equation (1), we have

4+3y=10

⇒3y=6

⇒y=

3

6

=2

Hence the cost of 1 pencil and 1 eraser respectively is Rs.4 and Rs.2 respectively.

Now,

Cost of 5 pencils and 4 erasers =5x+4y=(5×4)+(4×2)=20+8=28

Hence the cost of 5 pencils and 4 erasers is Rs.28.

Answer 2

Answer:

tall - Short

clean- dirty

I answered in this