One canteen bought 270 kg of mutton and beef.
15 of the mutton and
57 of the beef were sold. The amount of beef sold was 10 kg more than the amount of mutton sold.
- How much beef did the canteen buy?
- How much mutton did the canteen buy?
|
Mutton |
Beef |
Total |
Before |
5x5 = 25 u |
7 u |
+ 14 |
270 |
Change |
- 1x5 = - 5 u |
- 5 u |
- 10 |
|
After |
4x5 = 20 u |
2 u |
+ 4 |
|
(a)
10 ÷ 5 x 7 = 14
10 ÷ 5 x 2 = 4
Total mass of mutton and beef bought
= 25 u + 7 u + 14
= 32 u + 14
32 u + 14 = 270
32 u = 270 - 14
32 u = 256
1 u = 256 ÷ 32 = 8
Mass of beef bought
= 7 u + 14
= 7 x 8 + 14
= 56 + 14
= 70 kg
(b)
Mass of mutton bought
= 25 u
= 25 x 8
= 200 kg
Answer(s): (a) 70 kg; (b) 200 kg