Brown, grey and black cloths are sold in 10 cm, 90 cm and 30 cm long respectively. Ben wanted to buy equal length of each color. What is the least number of rolls of each color he must buy?
- brown cloth
- grey cloth
- black cloth
(a)
LCM of 10, 90 and 30 is 90.
Number of rolls for brown cloth
= 90 ÷ 10
= 9
(b)
Number of rolls for grey cloth
= 90 ÷ 90
= 1
(c)
Number of rolls for black cloth
= 90 ÷ 30
= 3
Answer(s): (a) 9; (b) 1; (c) 3