Adam has some paint.
He uses
35 of it to paint 8 doors and 4 desks.
The amount of paint needed to paint a desk is 4 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 |
8 |
4 |
Value |
1 u |
4 u |
Total value |
8 u |
16 u |
(a)
Paint needed for 1 door = 1 u
Paint needed for 1 desk = 4 u
Paint needed for 8 doors and 4 desks
= 8 x 1 u x 4 x 4 u
= 8 u + 16 u
= 24 u
35 of the paint = 24 u
15 of the paint = 24 u ÷ 3 = 8 u
Fraction of the remaining paint left
= 1 -
35=
25 25 of the paint = 2 x 8 u = 16 u
Remaining paint left = 16 u
Number of doors that Adam can paint with the remaining paint
= 16 u ÷ 1 u
= 16
(b)
Number of desks that Adam can paint with the remaining paint
= 16 u ÷ 4 u
= 4
Answer(s): (a) 16; (b) 4