Question

7 packet of balloon cost rs 63. Find the cost of 9 such packets​

Answer 1

Answer:

Cost of 7 packet is 63

so cost of 1 packet will be 63/7 that is 9 rupees

so cost of 9 such packets will be 9*9 that is 81.

₹81 is the answer

Answer 2

Answer:

81 $

Step-by-step explanation:

7 balloons cost = $ 63

1 balloon costs = $ (63/7) = $ 9

9 such balloons cost = $ (9 × 9)

= 81 $

This is a unitary method, if you wanna know how to make it work then go for the following steps:

• the quantity you need to find out should always occur on the right side of the equal

Example:

if the question says something like 3 pencils cost 5, find the cost of 6 pencils

Here, the quantity we need to find out is the cost! So the cost will occur on the right side of the equation.

Something like:

no. of balloons = cost of balloons

• Then, find the cost of 1 quantity in the next step

Example:

Taking the same example as above

the next step will be:

cost of 1 balloon = cost of balloons/ number of balloons.

• Then find the cost for the required amount

Example:

same example as above:

cost of 6 balloons = 6 × cost of 1 balloon.

That will get you the answer.

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Hope this helps!