Adam has some paint.
He uses
37 of it to paint 7 desks and 2 gates.
The amount of paint needed to paint a gate is 4 times that of a desk.
- How many desks can he paint using the remaining paint?
- How many gates can he paint using the remaining paint?
|
Desks |
Gates |
Number |
7 |
2 |
Value |
1 u |
4 u |
Total value |
7 u |
8 u |
(a)
Paint needed for 1 desk = 1 u
Paint needed for 1 gate = 4 u
Paint needed for 7 desks and 2 gates
= 7 x 1 u x 2 x 4 u
= 7 u + 8 u
= 15 u
37 of the paint = 15 u
17 of the paint = 15 u ÷ 3 = 5 u
Fraction of the remaining paint left
= 1 -
37=
47 47 of the paint = 4 x 5 u = 20 u
Remaining paint left = 20 u
Number of desks that Adam can paint with the remaining paint
= 20 u ÷ 1 u
= 20
(b)
Number of gates that Adam can paint with the remaining paint
= 20 u ÷ 4 u
= 5
Answer(s): (a) 20; (b) 5