Question

If 15 post cards cost Rs 45 then

a. What will be the cost of 12 postcards?

b. How many postcards can we buy for Rs. 90?​

Answer 1

Answer:

a. 36

b.30

cost of 15 poscard =45

cost of one postcard is 45/15 =3

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Answer 2

Answer:

The cost of 15 post cardd = 45

we have to find the cost of 1 post card

to find the cost of 1 post card

45/15 = 3

The cost of 1 post card is 3

a. To find the cost of 12 post cards

12× 3 = 36

= the cost of 12 post card is 36

b. to find how many how many post cards are but in $ 90

= 90/3

= 30 cards

therefore 30 cards are buys in rupee 90