Pink, white and grey cloths are sold in 30 cm, 70 cm and 10 cm long respectively. Billy wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- pink cloth
- white cloth
- grey cloth
(a)
LCM of 30, 70 and 10 is 210.
Number of rolls for pink cloth
= 210 ÷ 30
= 7
(b)
Number of rolls for white cloth
= 210 ÷ 70
= 3
(c)
Number of rolls for grey cloth
= 210 ÷ 10
= 21
Answer(s): (a) 7; (b) 3; (c) 21