₹ 1,000 is invested at 5% per annum simple interest. If the interest is added to the Aprincipal after every 10 years, the amount will become 2,000 after

Find two such numbers whose middle proportional is 18 and third proportional is 144.

4 boys and 3 girls spent Rs. 120 on an average, of which boys spent Rs. 150 on the average. Then the average amount spent by the girls is.

For an equilateral triangle, the ratio of the in-radius and the outer- radius is

Answer the following questions

P, Q and R alone can complete a piece of work in 24, 36 and 18 days respectively. P started working, after 2 days R joins with them and Q joins with them after another 2 days, then find the no of days P, Q and R worked together.

The given table represents the number of engineers recruited by four companies A, B, C and D over the years. Study the table carefully and answer the question that follow.

The total number of engineers recruited by company A in 2014 to 2017 is what percentage more than the total number of engineers recruited by all four companies in 2019?

If A: B = 4:5 and B:C= 3: 7 . What is the value of C:A?

If the height of the cylinder is 4 times its circumference, what is the volume of the cylinder with respect to its circumference c?