Adam has some paint.
He uses
512 of it to paint 8 cupboards and 6 chairs.
The amount of paint needed to paint a chair is 2 times that of a cupboard.
- How many cupboards can he paint using the remaining paint?
- How many chairs can he paint using the remaining paint?
|
Cupboards |
Chairs |
Number |
8 |
6 |
Value |
1 u |
2 u |
Total value |
8 u |
12 u |
(a)
Paint needed for 1 cupboard = 1 u
Paint needed for 1 chair = 2 u
Paint needed for 8 cupboards and 6 chairs
= 8 x 1 u x 6 x 2 u
= 8 u + 12 u
= 20 u
512 of the paint = 20 u
112 of the paint = 20 u ÷ 5 = 4 u
Fraction of the remaining paint left
= 1 -
512=
712 712 of the paint = 7 x 4 u = 28 u
Remaining paint left = 28 u
Number of cupboards that Adam can paint with the remaining paint
= 28 u ÷ 1 u
= 28
(b)
Number of chairs that Adam can paint with the remaining paint
= 28 u ÷ 2 u
= 14
Answer(s): (a) 28; (b) 14