A group of x boys planned to go on a summer vacation camp. Each bought food to last for 21 days. But due to some reason,2x boys joined the camp later. then, how many days would the same amount of food last?
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Answer:
food would last for ten and half days
Step-by-step explanation:
x : 21 : : 2x : k
=> x/21 = 2x/k
=> x/2x = k/21
=> 1/2 = k/21
=> 21/2 = k
=> 10.5 = k
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