Adam has some paint.
He uses
711 of it to paint 6 desks and 9 chairs.
The amount of paint needed to paint a chair is 4 times that of a desk.
- How many desks can he paint using the remaining paint?
- How many chairs can he paint using the remaining paint?
|
Desks |
Chairs |
Number |
6 |
9 |
Value |
1 u |
4 u |
Total value |
6 u |
36 u |
(a)
Paint needed for 1 desk = 1 u
Paint needed for 1 chair = 4 u
Paint needed for 6 desks and 9 chairs
= 6 x 1 u x 9 x 4 u
= 6 u + 36 u
= 42 u
711 of the paint = 42 u
111 of the paint = 42 u ÷ 7 = 6 u
Fraction of the remaining paint left
= 1 -
711=
411 411 of the paint = 4 x 6 u = 24 u
Remaining paint left = 24 u
Number of desks that Adam can paint with the remaining paint
= 24 u ÷ 1 u
= 24
(b)
Number of chairs that Adam can paint with the remaining paint
= 24 u ÷ 4 u
= 6
Answer(s): (a) 24; (b) 6