Adam has some paint.
He uses
25 of it to paint 2 desks and 7 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 |
2 |
7 |
Value |
1 u |
2 u |
Total value |
2 u |
14 u |
(a)
Paint needed for 1 desk = 1 u
Paint needed for 1 chair = 2 u
Paint needed for 2 desks and 7 chairs
= 2 x 1 u x 7 x 2 u
= 2 u + 14 u
= 16 u
25 of the paint = 16 u
15 of the paint = 16 u ÷ 2 = 8 u
Fraction of the remaining paint left
= 1 -
25=
35 35 of the paint = 3 x 8 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 ÷ 2 u
= 12
Answer(s): (a) 24; (b) 12