Removal of inedible parts or defective parts of foods

Read the following question and decide which of the statements is/are sufficient to answer the question.

Find the value of 'n'.

What is the total cost of painting a conical flask at the rate of Rs. 60 per square metre?

What was the age of Sonu 10 years ago?

I. Ram is seven years older than Sonu.

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.

Amar, Akbar and Anthony invested Rs 120000 in a business in ratio 5:3:2 respectively. What is the profit % earned by them after a year?

A man invested a sum of Rs 25,000. He invested some part at 5 % p.a. and remaining at 5.5% p.a. How much money did he invest at 5 % p.a.?

What is rate of interest percent per annum?

A. The amount becomes Rs.75,712 at compound interest after 2 years.

Rohit, Dhawan, Virat, Dhoni and Mayank a re five friends. Their mean age is 28. What is the age of Virat ?

What is the age of C, in a group of A, B, C, D and E whose average age is 50 years?

Statement I: Average of the age of D and E is 47 years?