White, black and green cloths are sold in 60 cm, 40 cm and 20 cm long respectively. Zane wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- white cloth
- black cloth
- green cloth
(a)
LCM of 60, 40 and 20 is 120.
Number of rolls for white cloth
= 120 ÷ 60
= 2
(b)
Number of rolls for black cloth
= 120 ÷ 40
= 3
(c)
Number of rolls for green cloth
= 120 ÷ 20
= 6
Answer(s): (a) 2; (b) 3; (c) 6