Adam has some paint.
He uses
56 of it to paint 2 doors and 4 desks.
The amount of paint needed to paint a desk is 2 times that of a door.
- How many doors can he paint using the remaining paint?
- How many desks can he paint using the remaining paint?
|
Doors |
Desks |
Number |
2 |
4 |
Value |
1 u |
2 u |
Total value |
2 u |
8 u |
(a)
Paint needed for 1 door = 1 u
Paint needed for 1 desk = 2 u
Paint needed for 2 doors and 4 desks
= 2 x 1 u x 4 x 2 u
= 2 u + 8 u
= 10 u
56 of the paint = 10 u
16 of the paint = 10 u ÷ 5 = 2 u
Fraction of the remaining paint left
= 1 -
56=
16 16 of the paint = 1 x 2 u = 2 u
Remaining paint left = 2 u
Number of doors that Adam can paint with the remaining paint
= 2 u ÷ 1 u
= 2
(b)
Number of desks that Adam can paint with the remaining paint
= 2 u ÷ 2 u
= 1
Answer(s): (a) 2; (b) 1