3. A block of mass m is suspended by strings as shown in the figure. The tension in the horizontal string is 36 N. The angle 0 is 60°. Find the mass of the block and the tension forces in string A and string
B

I am having trouble trying to answer this problem. Any help?

mass of the block is 7.2Kg

Tension on string A = 72N

Tension on the string with an angle is =  108N

Explanation:

The Horizontal string will have the cos component of the force...

Hence, mg cos60 = 36

by keeping acceleration due to gravity = 10 m/s^2, we get,

m = 7.2Kg

The tension in String A = mg = 7.2*10 = 72N

since the whole string holding the block is pulled by another string with 36 N

the resultant force will be the tension of the string with an angle.

Hence, 72 +36 = 108 N

Please let me know whether I got this right or not...