Select the correct passive form of the given sentence.

Hasn’t India established the air travel bridge to the Maldives?

The cost price of an article is Rs. 600. How much profit did a trader get by selling the article, if it was sold at 15% discount?

How many boys are there in the class?

I. The number of girls is 30% of the number of boys.

II. The ratio of the number of boys to that of girls is 3:5.

What was the sum of the ages of the father and the daughter 5 years earlier?

What is the length of a wooden board of width 6 metres and thickness one-third of the width?

I. Surface area of the board is 152 m².

What was the price of House P last year?

Statement I:  The ratio of the price of two houses P to Q was 3:4 last year.

What is the profit percent or loss percent incurred in the transaction?

I. 5% discount is given on the marked price.

How many students passed in first class?

I. 75% of the students who appeared in the examination have passed in first or second or third class.

What is the yearly salary of Mr. Rohan?