Question
PSLE
Usha had two strings of the same length. She cut the first string into equal parts of length 45 cm and to each part she tied 3 yellow paper cranes. After that, she cut the second string into equal parts of length 50 cm and to each part she tied 4 purple paper cranes. When she finished tying, she counted that there were 30 more purple paper cranes than yellow paper cranes. How many paper cranes were there altogether?
5 m

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PSLE
Usha had two strings of the same length. She cut the first string into equal parts of length 45 cm and to each part she tied 3 yellow paper cranes. After that, she cut the second string into equal parts of length 50 cm and to each part she tied 4 purple paper cranes. When she finished tying, she counted that there were 30 more purple paper cranes than yellow paper cranes. How many paper cranes were there altogether?