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Question
48 people want to go on a road trip. There are 4 - seater cars and 9 - seater cars available for hire. If the group decides to travel without leaving empty seats, how many 4 - seater cars and how many 9 - seater cars must be hired ?
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Solution
Total number of people = 48
Cars available for hiring = 4 - seater and 9 - seater
Multiples of 4: 4, 8, 12, 16, 20, 24, 28...
Multiples of 9: 9, 18, 27, 36, 45...
Here, 12 + 36 = 48
∴ 3 cars of 4 - seater and 4 cars of 9-seater are required to accomodate 48 people without leaving empty seats.
∴34− seater cars and 4 - 9 seater cars must be hired
Cars available for hiring = 4 - seater and 9 - seater
Multiples of 4: 4, 8, 12, 16, 20, 24, 28...
Multiples of 9: 9, 18, 27, 36, 45...
Here, 12 + 36 = 48
∴ 3 cars of 4 - seater and 4 cars of 9-seater are required to accomodate 48 people without leaving empty seats.
∴34− seater cars and 4 - 9 seater cars must be hired
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