Step-by-step explanation:

There are 60 seconds in one minute
3 1/2 minutes = 3 1/2 * 60 = 210 seconds , Answer
Answer: 171
Step-by-step explanation:
1 and3can form the triangle
As the sum of 2sides is greater then the 3rdside
Like for first one
12+14>18
26>18
Yes
14+18>12
32>12
Yes
12+18>14
30>14
Yes
so the first set of sides can become a triangle