For the following questions answer them individually
Which of the following relations is/are true?
I. $$\sqrt{7}+\sqrt{3}>\sqrt{5}+\sqrt{5}$$
II. $$\sqrt{5}+\sqrt{5}>\sqrt{2}+\sqrt{8}$$
III. $$\sqrt{5}+\sqrt{5}>\sqrt{7}+\sqrt{3}$$
Pipe A can fill a tank in 12 hours and pipe B can fill the tank in 18 hours. If both the pipes are opened on alternate hours and if pipe B is opened first, then in how much time (in hours) the tank will be full?
A B and C can do a piece of work in 20, 24 and 30 days respectively. All three of them began the work together but B left 3 days before completion of the work. In how many days was the work completed ?
The marked price of an article is Rs. 8480. If a discount of 12.5% is given, then what will be the selling price (in Rs.) of the article ?
An item is sold for Rs. 1428 after two successive discounts of 12.5% and 20%. What is the marked price (in Rs.) of the article ?
If $$\frac{A}{B}=\frac{2}{3},\frac{B}{C}=\frac{4}{5}$$ and $$\frac{C}{D}=\frac{3}{2}$$,then what is the ratio of A : B : C : D?
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