Mark covers a distance of 22.5 miles in 12 minutes. What is his speed in meters per second?

Lisa is 150 months older than Mathew. If the ratio of their respective ages is 11:8 then what will be Mathew's age after 79 months?

The lengths of three sides of a right angled triangle are 0.09 meters, 120000 microns and 3.15 inches. If a cone is formed by rotating the triangle along the side of 3.15 inches length, then what is the volume of the cone in cubic centimeters?

Mary borrowed $1800 from Elena at an interest rate of 12% per annum (compound interest) for 36 months. What will be the approximate value of the amount paid by Elena after 36 months if the interest is calculated quarterly?

If the principal amount is $8000 and the rate of interest is 4% per annum computed half yearly, then in how many months will the compound interest of $659.46 be generated?

The length(l) and breadth(b) of a cistern is 0.78 kilometers and 699.9 cubits respectively. The level of water in the cistern is up to 106 meters and 35 centimeters. What is the approximate area of the wet surface of the cistern where area of wet surface = 2(bh + lh) + lb?

Mark needs to build a boundary wall on one side of his garden. The length, breadth, and height of the wall should be 100 feet, 49.21 feet, and 63 meters respectively. How many bricks will be required if the length, breadth, and height of each brick is 1200 cm, 1800 mm and 15 decimeters respectively?

Nina is 5844 days younger than Paul. In 209 weeks, her age will be half the age of Paul. What is the approximate age of Nina at present?

Sonia borrowed $62500 from a bank for 48 months. If the rate of interest per annum is 16% then what is the approximate value of compound interest paid by Sonia at the end of 48 months?

Mark invested $5600 in a simple interest scheme for 4 years and 6 months. He lends the money thus obtained to Sam at the rate of 5% (compound interest) for 1 year. The interest is calculated half yearly and the duration of the loan is 1 year. If the amount obtained after one year is $8535.56, then what is the approximate rate of simple interest?

In how many weeks will a principal of $4600 amount to $5290 at a simple interest rate of 2.5% per annum.