The owner of a bike buys petrol for 3 years continuously at Rs 64, Rs 80 and Rs 320 per litre respectively. If he spends Rs 32,000 every year buying petrol, what is the average price per litre of petrol?

If one number is 50 percent less than X and the other numbers are 20 percent less than X. What is the ratio of both the numbers?

If the compound interest rate is 20%  per year, compounded half-yearly, then what will be the interest of two years on the principal of 1,00,000?

What will be the area of the curved surface of an elliptical cylinder whose height and diameter are 10 cm and 8 cm respectively?

If A: B=3: 4, B:C =2:3 then what is the value of A +B: B+C: C+A?

The ratio of the sides of a triangle is $$ {1\over2}$$: $$ {1\over3}$$: $$ {1\over4}$$ and its perimeter is 104 cm. is. What is the length of the longest arm?

Chandu bought a watch at 20 percent discount on mark price but sold it at mark price. Find the percentage of profit.

The marked Price of a television is Rs. 12,000 and the shopkeeper gives 5 percent discount on it. So what is its selling price