Rashi can finish a work alone in 10 hours, Gopi alone in 8 hours and Manju alone in 12 hours. How long will they take if they worked together?

A

$$3\frac{11}{37}$$ hours

B

$$4\frac{7}{37}$$ hours

C

$$4\frac{3}{37}$$ hours

D

$$3\frac{9}{37}$$ hours