One eating house bought 248 kg of mutton and chicken.
15 of the mutton and
34 of the chicken were sold. The amount of chicken sold was 15 kg more than the amount of mutton sold.
- How much chicken did the eating house buy?
- How much mutton did the eating house buy?
|
Mutton |
Chicken |
Total |
Before |
5x3 = 15 u |
4 u |
+ 20 |
248 |
Change |
- 1x3 = - 3 u |
- 3 u |
- 15 |
|
After |
4x3 = 12 u |
1 u |
+ 5 |
|
(a)
15 ÷ 3 x 4 = 20
15 ÷ 3 x 1 = 5
Total mass of mutton and chicken bought
= 15 u + 4 u + 20
= 19 u + 20
19 u + 20 = 248
19 u = 248 - 20
19 u = 228
1 u = 228 ÷ 19 = 12
Mass of chicken bought
= 4 u + 20
= 4 x 12 + 20
= 48 + 20
= 68 kg
(b)
Mass of mutton bought
= 15 u
= 15 x 12
= 180 kg
Answer(s): (a) 68 kg; (b) 180 kg