The ratio of efficiences of a man and a woman is 3 : 2. If 15 men take 24 days to complete a work, working 12 hrs a day, how much time will 18 women take to complete the same work working 10 hrs a day?

45 days 32 days  48 days 36 days

36 days

M x Eff. x Hrs. x Days = constant (when work is same) 15 x 3 x 12 x 24  = 18 x 2 x 10 x No. of days No. of days = 36 days