Answers: 2017 Psle Math Questions And

Ribbon used for small boxes: ( 0.8 \times S ) metres. Ribbon used for large boxes: ( 1.2 \times (S + 3) ) metres.

Time needed = ( \frac{\text{remaining}}{\text{rate}} = \frac{\frac{5}{12}}{\frac{5}{12}} = 1 ) hour. 2017 psle math questions and answers

Remaining empty: ( 1 - \frac{7}{12} = \frac{5}{12} ) tank. Ribbon used for small boxes: ( 0

Wait — this gives ( S = 0.9 ), which is impossible (boxes must be whole numbers). This suggests that my reconstructed numbers are off; the actual 2017 question had different values (e.g., 8.4 m total ribbon, etc.), but the remains the same: form a linear equation from the total length. 8.4 m total ribbon