A student bought 4 m of yellow ribbon, 6 m of red ribbon and 3 m of blue ribbon for decorating a room. How many metres of ribbon did he buy ?
Length of yellow ribbon = 4.1/3 m = 13/3 m
Length of red ribbon = 6.1/6 m = 37/6 m
Length of blue ribbon = 3.2/9 m = 29/9 m
Total length of ribbon = 13/3 + 37/6 + 29/9
= (78 + 111 + 58)/18 (L.C.M. of 3, 6, 9 = 18)
= 247/18
= 13.13/18 metres