The wheel of an engine, 17.5 cm in radius, makes 1200 revolutions in 2 min. Speed of the engine is

• 10m/s

• 11m/s

• 12m/s

• 12.5m/s

The value of a machine which was purchased 2 yr ago, depreciates at 12% per annum. If its present value is Rs.9680, for how much was it purchased?

• Rs. 12142.60

• Rs. 11350.50

• Rs. 12500

• Rs. 10200

3.

A sum of money amounts to Rs. 4818 after 3 yr and  Rs. 7227 after 6 yr on compound interest. The sum is

• 3122

• 3212

• 2409

• 2490

If the weight of 18 sheets of paper is 50 g, how many sheets of the same paper will weigh 3$\frac{3}{4}$kg

• 1386

• 1836

• 1350

• 1314

Abhi is twice as old as his daughter. Five years ago, his age was four times his daughter's age. If the present age of the daughter is x yr, then

• $2\left(\mathrm{x} - 5\right) = 4\left(2\mathrm{x} - 5\right)$

• $2\left(\mathrm{x} - 5\right) = 4\left(2\mathrm{x} + 5\right)$

• $4\left(\mathrm{x} - 5\right) = 2\mathrm{x} - 5$

• $4\left(\mathrm{x} + 5\right) = 2\left(2\mathrm{x} - 5\right)$

A sum of Rs. 6250 at 8% per annum, compounded annually, after 2$\frac{3}{4}$ yr amounts to

• Rs 7165.60

• Rs 7872.60

• Rs 7581.40

• Rs 7727.40

Given Pie-graph shows the cost of construction of a house. If total cost of construction is Rs 1500000, then the amount spent on labour is

• Rs. 90000

• Rs. 250000

• Rs. 360000

• Rs. 375000

2 tables and 3 chairs together cost Rs. 2000 where as 3 tables and 2 chairs together cost Rs. 2500. Then, the total cost of 1 table and 5 chairs are

• Rs. 1800

• Rs. 1700

• Rs. 1900

• Rs. 2000

The difference between simple interest and compound interest on certain sum of money for 2 yr at 5% per annum is Rs. 51, then sum will be

• Rs. 21000

• Rs. 20550

• Rs. 21500

• Rs. 20400