Anumber is 3 tens more than 249. what is the number?

Idk is it 279?? tell me if am wrong plzz

279 I think because 4+3=7 and 3 = the tenths your adding

First, divide 48 in half

48/2 = 24

Then take 2 away from 24

24-2 = 22

Now add the 2 to the other 24

24+2 = 26

Divide 22 and 26 in half

26/2 = 13 (the length of one side)  22/2 = 11 (the width of one side)

Get the area of the painting using a=lw

13*11 = 143

Now, save that area for later and find the length and width of the frame by adding three to both numbers

13+3 = 16 
11+3 = 14

Get the area of 16 and 14

16*14 = 224

Finally, subtract 143 from 224

224 - 143 = 81

81 is the area of the frame

I hope this helps you!