What will come in place of the question mark (?) in each of the following series?

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Suresh is half his father’s age. After 20 years, his father’s age will be one and a half times Suresh’s age. What is his father’s age now?

In the given figure AD ‖ BE, and ∠DCE=85° and ∠BDC=30° then find out the value of x?

A and B started a boutique investing amounts of ₹ 35,000 and ₹ 56, 000 respectively. If A ' s share in the profit earned by them is ₹ 45, 000 then what is - the total profit earned?

The age of Shipra can be obtained by subtracting three times her age 3 years ago from the three times her age after 3 years. What will her age after 2 years?

The average age of 30 boys in a class is 15 years. One boy, aged 20 years, left the class, but two new boys came in his place whose age differs by 5 years. If the average age of all the boys now in the class becomes 15 years, the age of the younger newcomer is: 

P purchase an item for Rs 1200 and sold it on a profit of 10%. If he sells it at Rs 1380 then calculate his increase in profit percentage.