A tour bus has a capacity of 42 adults or 56 children. There are 18 adults and 19 children on the bus. How many more children can the bus take?
Solution
Adults : Children
42 : 56
(reduce to lowest term)
3 : 4
For every 1 group of 3 adults, the bus can seat 1 group of 4 children.
Currently in bus
18 adults + 19 children
Equivalent to
6 groups of 3 adults + 19 children
Equivalent to
6 groups of 4 children + 19 children
Equivalent to
24 children + 19 children = 43 children
No. of children more that the bus can take
56 – 43 = 13
Answer: 13 more children can take the bus.
Monday, May 12, 2008
Ai Tong School P6 SA1 2006 Math (Q40)
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1 comment:
Sir,
alternatively, we can convert 18 adults to children:
Solution:
42 adults -----> 56 children
18 adults -----> (56 * 18)/42
= 24 children
Total number of children on the bus :
24 + 19 = 43 children
56 - 43 = 13 children more
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