411 of a metallic rod was painted purple.
311 of it was painted black. The remaining 28 cm of the metallic rod was painted brown.
- What fraction of the metallic rod was painted brown?
- What was the length of the metallic rod?
(a)
Fraction of the metallic rod painted brown
= 1 -
411 -
311=
411(b)
Length of brown part of the metallic rod = 4 u
4 u = 28
1 u = 28 ÷ 4 = 7
Length of the metallic rod
= 11 u
= 11 x 7
= 77 cm
Answer(s): (a)
411; (b) 77 cm