White, blue and brown cloths are sold in 40 cm, 30 cm and 20 cm long respectively. Elijah wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- white cloth
- blue cloth
- brown cloth
(a)
LCM of 40, 30 and 20 is 120.
Number of rolls for white cloth
= 120 ÷ 40
= 3
(b)
Number of rolls for blue cloth
= 120 ÷ 30
= 4
(c)
Number of rolls for brown cloth
= 120 ÷ 20
= 6
Answer(s): (a) 3; (b) 4; (c) 6