The length of a rectangle is 6 cm more than its width and its perimeter is 100 cm. If the area of this rectangle is closest to the area of a circle, then what is the circumference of that circle?

If 20 taps can fill a tank in 14 hours, then how many times will 35 taps fill that tank?

7 men or 10 women can build a 100-meter-long wall in 10 days, then how many days will it take 14 men and 20 women to build a 600-meter-long wall?

Which of the two numbers should be reduced in the ratio of 15:19 so that the ratio becomes 3: 4?

The average age of three boys is 18 years and their age ratio is 2: 3: 4, then what is the age of the youngest boy?

Ram started a business with a sum of Rs 600. After 3 months Shyam and after 6 months Mohan also become partners. If the profit at the end of the year was divided in the ratio of 4: 5: 3, then how much was Shyam's capital more than Mohan's capital.

In how many years will Rs 2000 become Rs 2420 at 10 percent compound annual interest?

Which amount will be Rs 520 in 5 years with simple interest and Rs 568 in 7 years?