Mock Paper 14 Aug 2025 23:39

\[ \begin{array}{l} \text{Ravi is swimming lengths of a swimming pool.} \\ \text{Each length of the pool is 20 m.} \\ \text{Ravi has swum 100 lengths of the pool.} \\ \text{He wants to swim a total distance of 3200 m.} \\ \\ \text{Calculate how many more lengths Ravi needs to swim.} \end{array} \]