Small durians |
Medium durians |
Large durians |
$2 |
$8 |
$9 |
Ethan had some durians in 3 sizes. The number of medium durians was twice the number of large durians. The number of large durians were thrice the number of small durians. He sold all the small and medium durians. He received $432 from selling
23 of the large durians.
- How many large durians did he have at first?
- How much less did he collect from selling the small durians than the medium durians?
Small durians |
Medium durians |
Large durians |
|
2x3 |
1x3 |
1x1 |
|
3x1 |
1 u |
6 u |
3 u |
(a)
The number of large durians is the repeated identity. Make the number of large durians the same. LCM of 1 and 3 is 3.
|
Small durians |
Medium durians |
Large durians |
Before |
1 u |
6 u |
3 u |
Change |
- 1 u |
- 6 u |
- 2 u |
After |
0 |
0 |
1 u |
Number of large durians that Ethan sold
=
23 x 3 u
= 2 u
|
Small durians |
Medium durians |
Large durians |
Number |
1 u |
6 u |
2 u |
Value |
$2 |
$8 |
$9 |
Total value |
2 u |
48 u |
18 u |
Amount that Ethan received from selling of
23 of the large durians = 18 u
18 u = 432
1 u = 432 ÷ 18 = 24
Number of large durians at first
= 3 u
= 3 x 24
= 72
(b)
Amount that Ethan collected less from selling the small durians than the medium durians
= 48 u - 2 u
= 46 u
= 46 x 24
= $1104
Answer(s): (a) 72; (b) $1104