Question
One watermelon cost 3 times as much as one mangosteen. Mrs Zhang bought 4 watermelons and 3 mangosteens for $16.90. How much would 5 watermelons and 10 mangosteens cost? Express the answers to 2 decimal places.
3 m

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One watermelon cost 3 times as much as one mangosteen. Mrs Zhang bought 4 watermelons and 3 mangosteens for $16.90. How much would 5 watermelons and 10 mangosteens cost? Express the answers to 2 decimal places.