Answer :

Answer:

30 envelopes

Step-by-step explanation:

If the Cost of 135 envelopes is Rs 45, then;

135 envelopes = Rs. 45

To get the amount of envelopes Rs. 10 can buy, we can write;

x = Rs. 10

Divide both expressions

135/x = 45/10

45x = 135 * 10

45x = 1350

x = 1350/45

x = 30

Hence Rs. 10 can purchase 30 envelopes

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Rewritten by : Barada