Grey, black and silver cloths are sold in 10 cm, 40 cm and 30 cm long respectively. Riordan wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- grey cloth
- black cloth
- silver cloth
(a)
LCM of 10, 40 and 30 is 120.
Number of rolls for grey cloth
= 120 ÷ 10
= 12
(b)
Number of rolls for black cloth
= 120 ÷ 40
= 3
(c)
Number of rolls for silver cloth
= 120 ÷ 30
= 4
Answer(s): (a) 12; (b) 3; (c) 4