Question
One watermelon cost 3 times as much as one pear. Mrs Zhang bought 3 watermelons and 2 pears for $25.20. How much would 7 watermelons and 10 pears cost? Express the answers to 2 decimal places.
3 m

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One watermelon cost 3 times as much as one pear. Mrs Zhang bought 3 watermelons and 2 pears for $25.20. How much would 7 watermelons and 10 pears cost? Express the answers to 2 decimal places.