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Question
primary 6 | Maths
| Fractions
2 Answers Below
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anyone free to help ? would appreciate it, this is a working backwards question
Date Posted: 4 years ago
Views: 284
after C = 120
b4 C = (120-18) x 4/3 = 136
b4 B = (136-37) x 5/3 = 165
b4 A = 165-20 = 145
OR
b4 A: 1u
after A: 1u + 20
after B: 3/5 x (1u + 20)+37
= 3u/5+49
after C: 3/4 x (3u/5+49) + 18
=9u/20 + 219/4
9u/20 + 219/4 = 120
1u = 145
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.
.
b4 C = (120-18) x 4/3 = 136
b4 B = (136-37) x 5/3 = 165
b4 A = 165-20 = 145
OR
b4 A: 1u
after A: 1u + 20
after B: 3/5 x (1u + 20)+37
= 3u/5+49
after C: 3/4 x (3u/5+49) + 18
=9u/20 + 219/4
9u/20 + 219/4 = 120
1u = 145
.
.
.
See 2 Answers
done
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1/4 alighted means 3 units is left, original is 4 units
2/5 alighted means 3 units is left, original is 5 units.
2/5 alighted means 3 units is left, original is 5 units.
Date Posted:
4 years ago
done
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the answer is 145
Date Posted:
4 years ago
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