Red, grey and black cloths are sold in 10 cm, 20 cm and 40 cm long respectively. Oscar wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- red cloth
- grey cloth
- black cloth
(a)
LCM of 10, 20 and 40 is 40.
Number of rolls for red cloth
= 40 ÷ 10
= 4
(b)
Number of rolls for grey cloth
= 40 ÷ 20
= 2
(c)
Number of rolls for black cloth
= 40 ÷ 40
= 1
Answer(s): (a) 4; (b) 2; (c) 1