A man can row 30 km downstream and return in a total of 8 hours. If the speed of the boat in still water is four times the speed of the current, then the speed of the current is: 

Directions: The following pie-chart represents the result of 600 successful students in various subject of an examination. Study the Pie-chart and answer question.

The percentage of students who passed in English is

In an office, there are 108 tables and 132 chairs. If $${1\over6} $$ of the tables and $${1\over4} $$ of the chairs are broken. How many people can work in the office if each person requires one table and one chair? 

An amount of money appreciates to Rs. 7,000 after 4 years and to Rs. 10,000 after 8 years at a certain compound interest compounded annually. The initial amount of money was 

A shopkeeper gives two successive discounts on an article marked ₹ 450. The first discount given is 10 percent. If the customer pays 344.25 for the article, the second discount given is 

The difference between the average of three consecutive even numbers and the average of the next two consecutive even number is 5. What is first even number?

The sum of two numbers is 84 and their HCF is 12. Total number of such pairs of number is 

Find the area of the shaded region if the radius of each of the circle is 1 cm.