Adam has some paint.
He uses
35 of it to paint 10 desks and 4 gates.
The amount of paint needed to paint a gate is 5 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 |
10 |
4 |
Value |
1 u |
5 u |
Total value |
10 u |
20 u |
(a)
Paint needed for 1 desk = 1 u
Paint needed for 1 gate = 5 u
Paint needed for 10 desks and 4 gates
= 10 x 1 u x 4 x 5 u
= 10 u + 20 u
= 30 u
35 of the paint = 30 u
15 of the paint = 30 u ÷ 3 = 10 u
Fraction of the remaining paint left
= 1 -
35=
25 25 of the paint = 2 x 10 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 ÷ 5 u
= 4
Answer(s): (a) 20; (b) 4