By selling a cycle for Rs. 2345, a student loses 19%. His cost price is nearly

• Rs. 4000

• Rs. 5000

• Rs. 3000

• Rs. 3000

If selling price of 10 articles is equal to cost price of 11 articles, then gain is

• 8%

• 9%

• 8.5%

• 8.5%

In a factory, the production of scooters rose to 48400 from 40000 in 2 years. The rate of growth per annum is

• 20%

• 10%

• 30%

• 30%