A 10kg mass is suspended from the ceiling by two light strings. One string makes an angle of 30∘ with the horizontal and the other makes 60∘ with the horizontal. The system is at rest. What is the tension in the string that makes 30∘ with the horizontal? (Take g=9.8m s−2.)
a) 85N
b) 49N
c) 56N
d) 72N