Question

the cost of 7 pens is 21 rs .find the cost of 11 such pens ?​

Answer 1

Question:

The cost of 7 pens is ₹ 21. Find the cost of 11 pens.

Given,

Cost of 7 pens = ₹ 21

Now,

Cost of 1 pen = ₹ 21 ÷ 7

= ₹ 3

Thus,

Cost of 11 pens = 11 × ₹ 3

= ₹ 33

The cost of 11 pens is ₹ 33

Solved by Unitary Method.

Hope it helps

Answer 2

Answer:

33 pens

Step-by-step explanation:

The cost of 1 pen - 3 rs

The cost of 7 pens - 21 rs

Therefore the cost of 11 pens - (3 X 11 )

= 33 pens