White, purple and grey cloths are sold in 90 cm, 30 cm and 20 cm long respectively. Japheth wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- white cloth
- purple cloth
- grey cloth
(a)
LCM of 90, 30 and 20 is 180.
Number of rolls for white cloth
= 180 ÷ 90
= 2
(b)
Number of rolls for purple cloth
= 180 ÷ 30
= 6
(c)
Number of rolls for grey cloth
= 180 ÷ 20
= 9
Answer(s): (a) 2; (b) 6; (c) 9