Adam has some paint.
He uses
25 of it to paint 10 tables and 9 desks.
The amount of paint needed to paint a desk is 2 times that of a table.
- How many tables can he paint using the remaining paint?
- How many desks can he paint using the remaining paint?
|
Tables |
Desks |
Number |
10 |
9 |
Value |
1 u |
2 u |
Total value |
10 u |
18 u |
(a)
Paint needed for 1 table = 1 u
Paint needed for 1 desk = 2 u
Paint needed for 10 tables and 9 desks
= 10 x 1 u x 9 x 2 u
= 10 u + 18 u
= 28 u
25 of the paint = 28 u
15 of the paint = 28 u ÷ 2 = 14 u
Fraction of the remaining paint left
= 1 -
25=
35 35 of the paint = 3 x 14 u = 42 u
Remaining paint left = 42 u
Number of tables that Adam can paint with the remaining paint
= 42 u ÷ 1 u
= 42
(b)
Number of desks that Adam can paint with the remaining paint
= 42 u ÷ 2 u
= 21
Answer(s): (a) 42; (b) 21