4 girls can do a piece of work in 8 days, 3 boys can do the same piece of work in 9 days, 7 men do the same piece of work in 2 days and 5 women can do the same piece of work in 4 days. Who is least efficient?
(1) Boys
(2) Girls
(3) Women
(4) Men
(5) Boys and men both

• girls...
  
  4G*8 = 3B*9 = 7M*2 = 5W*4
  G*32 = B*27 = M*14 = W*20
  :. G:B:M:W = 1/32 : 1/27 : 1/14 : 1/20
  among them we can see that 1/32 is least . So girls are least efficient
• 7 years agoHelpfull: Yes(0) No(0)