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2 years ago

10

in a hostel 30 students have enough food for 40 days how many students should leave the hostel so that the food is enough for 10

0 days

1 answer:

Sonbull [250]2 years ago

8 0

Answer:

18 students

Step-by-step explanation:

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Answer:

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Step-by-step explanation:

$\left(\dfrac{1}{x}+x\right)^2=25\qquad\text{use}\ (a+b)^2=a^2+2ab+b^2\\\\\left(\dfrac{1}{x}\right)^2+2(x\!\!\!\!\diagup)\left(\dfrac{1}{x\!\!\!\!\diagup}\right)+x^2=25\\\\\dfrac{1}{x^2}+2+x^2=25\qquad\text{subtract 2 from both sides}\\\\\dfrac{1}{x^2}+x^2=23$

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