Grey, blue and green cloths are sold in 60 cm, 20 cm and 90 cm long respectively. John wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- grey cloth
- blue cloth
- green cloth
(a)
LCM of 60, 20 and 90 is 180.
Number of rolls for grey cloth
= 180 ÷ 60
= 3
(b)
Number of rolls for blue cloth
= 180 ÷ 20
= 9
(c)
Number of rolls for green cloth
= 180 ÷ 90
= 2
Answer(s): (a) 3; (b) 9; (c) 2