Small coconuts |
Medium coconuts |
Large coconuts |
$2 |
$4 |
$6 |
Justin had some coconuts in 3 sizes. The number of medium coconuts was twice the number of large coconuts. The number of large coconuts were five times the number of small coconuts. He sold all the small and medium coconuts. He received $24 from selling
15 of the large coconuts.Justin had some coconuts in 3 sizes.
He sold all the small and medium coconuts. He received $24 from selling
15 of the large coconuts.
- How many medium coconuts did he have at first?
- How much more did he collect from selling the medium coconuts than the small coconuts?
Small coconuts |
Medium coconuts |
Large coconuts |
|
2x5 |
1x5 |
1x1 |
|
5x1 |
1 u |
10 u |
5 u |
(a)
The number of large coconuts is the repeated identity. Make the number of large coconuts the same. LCM of 1 and 5 is 5.
|
Small coconuts |
Medium coconuts |
Large coconuts |
Before |
1 u |
10 u |
5 u |
Change |
- 1 u |
- 10 u |
- 1 u |
After |
0 |
0 |
4 u |
Number of large coconuts that Justin sold
=
15 x 5 u
= 1 u
|
Small coconuts |
Medium coconuts |
Large coconuts |
Number |
1 u |
10 u |
1 u |
Value |
$2 |
$4 |
$6 |
Total value |
2 u |
40 u |
6 u |
Amount that Justin received from selling of
15 of the large coconuts = 6 u
6 u = 24
1 u = 24 ÷ 6 = 4
Number of medium coconuts at first
= 10 u
= 10 x 4
= 40
(b)
Amount that Justin collected more from selling the medium coconuts than the small coconuts
= 40 u - 2 u
= 38 u
= 38 x 4
= $152
Answer(s): (a) 40; (b) $152