In a kilometer race, A can give B a start of 100 m or 15 seconds. How long does A take to complete the race?

A number is doubled and 9 is added. If the resultant is tripled, it becomes 75. What is that number? 

The number of students in a school increases and decreases by 10% respectively in every alternate year. If there was increase in the year 2000 then in how much percentage what happened in the number of students in the vear 2003 in comparison to year 2000.

Pie chart shows the percent of money spent by family on various item during 1999. Study the graph and answer these questions.

The ratio of the total amount of money spent on housing to that spent on education was

S is 20% more than T. T is 10% less than U. What is the ratio of S to ?

A man travelled a distance of 60 kms in 10 hours . He travelled partly on foot at 5 kms per hour and partly on bicycle at 7 kms per hour . What is the distance travelled on foot ? 

Direction: Study the following graph carefully and answer the following questions.

What is the difference between average demand and average production of the five companies taken together?

A rectangular grass plot 80 m × 60 m has two roads, each 10 m wide, running in the middle of it; one parallel to length and the other parallel to breadth. Find the cost of gravelling the roads at ₹ 2 per m².