Adam has some paint.
He uses
57 of it to paint 9 desks and 3 chairs.
The amount of paint needed to paint a chair is 2 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 |
9 |
3 |
Value |
1 u |
2 u |
Total value |
9 u |
6 u |
(a)
Paint needed for 1 desk = 1 u
Paint needed for 1 chair = 2 u
Paint needed for 9 desks and 3 chairs
= 9 x 1 u x 3 x 2 u
= 9 u + 6 u
= 15 u
57 of the paint = 15 u
17 of the paint = 15 u ÷ 5 = 3 u
Fraction of the remaining paint left
= 1 -
57=
27 27 of the paint = 2 x 3 u = 6 u
Remaining paint left = 6 u
Number of desks that Adam can paint with the remaining paint
= 6 u ÷ 1 u
= 6
(b)
Number of chairs that Adam can paint with the remaining paint
= 6 u ÷ 2 u
= 3
Answer(s): (a) 6; (b) 3