The average weekly number of toy planes produced by Factory U and V is 3256. The average weekly number of toy planes produced by Factory U and W is 6291. If Factory V produced ⁴₉ as many toy planes as Factory W each week, how many toy planes does Factory U produce weekly?
Total toy planes that Factory U and Factory V produced
= 3256 x 2
= 6512

Total toy planes that Factory U and Factory W produced
= 6291 x 2
= 12582

Number of toy planes produced by Factory V = 4 u
Number of toy planes produced by Factory W = 9 u

Factory U's toys + 4 u = 6512 --- (1)
Factory U's toys + 9 u = 12582 --- (2)

(2) - (1)
9 u - 4 u = 12582 - 6512
5 u = 6070
1 u = 6070 ÷ 5 = 1214

Number of toy planes produced by V
= 4 u
= 4 x 1214
= 4856

Number of toy planes produced by U
= 6512 - 4856
= 1656

Answer(s): 1656