Adam has some paint.
He uses
611 of it to paint 9 desks and 3 cupboards.
The amount of paint needed to paint a cupboard is 5 times that of a desk.
- How many desks can he paint using the remaining paint?
- How many cupboards can he paint using the remaining paint?
|
Desks |
Cupboards |
Number |
9 |
3 |
Value |
1 u |
5 u |
Total value |
9 u |
15 u |
(a)
Paint needed for 1 desk = 1 u
Paint needed for 1 cupboard = 5 u
Paint needed for 9 desks and 3 cupboards
= 9 x 1 u x 3 x 5 u
= 9 u + 15 u
= 24 u
611 of the paint = 24 u
111 of the paint = 24 u ÷ 6 = 4 u
Fraction of the remaining paint left
= 1 -
611=
511 511 of the paint = 5 x 4 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 cupboards that Adam can paint with the remaining paint
= 20 u ÷ 5 u
= 4
Answer(s): (a) 20; (b) 4