If the areas of three adjacent faces of a rectangular box which meet in a corner are 12 cm2, 15 cm2, and 20 cm2 respectively. Then the volume of the box is
A hollow cylindrical tube 20 cm long is made of iron and its external and internal diameters are 8 cm and 6 cm respectively. The volume (in cubic cm) of iron used in making the tube is (Take n = 22/7)
If a sum of money becomes 4000 in 2 yrs and 5500 in 4 yrs 6 months at the same rate of simple interest per annum. Then the rate of simple interest is
A man invested a sum of money at compound interest. It amounted to Rs. 2420 in 2 years and to Rs. 2662 in 3 years. Find the sum.
If A borrowed Rs. P at x% and B borrowed Rs. Q (>P) at y% per annum at simple interest at the same time, then the amount of their debts will be equal after
The compound interest on Rs. 30000 at 7% per annum for n years is Rs. 4347. The value of n is