Adam has some paint.
He uses
911 of it to paint 9 cupboards and 6 chairs.
The amount of paint needed to paint a chair is 3 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 |
9 |
6 |
Value |
1 u |
3 u |
Total value |
9 u |
18 u |
(a)
Paint needed for 1 cupboard = 1 u
Paint needed for 1 chair = 3 u
Paint needed for 9 cupboards and 6 chairs
= 9 x 1 u x 6 x 3 u
= 9 u + 18 u
= 27 u
911 of the paint = 27 u
111 of the paint = 27 u ÷ 9 = 3 u
Fraction of the remaining paint left
= 1 -
911=
211 211 of the paint = 2 x 3 u = 6 u
Remaining paint left = 6 u
Number of cupboards 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 ÷ 3 u
= 2
Answer(s): (a) 6; (b) 2