Cost of 135 envelopes is Rs 45. How many envelopes can be purchased for Rs 10 ?

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

the answer for this question is : 360°

step-by-step explanation:

we have been given a triangle   we need to tell which one of these is a triangle below to map onto itself.

360° rotation is the complete rotation which eventually leads to the same figure which is given.

the correct will be, that is 360° that will cause the triangle below to map onto itself.