Quantitative Aptitude - Arithmetic Ability Questions

If sin3A = x, then value of x is

By selling 175 pineapples, the gain is equal to the selling price of 50 pineapples. What is the gain percentage?

In the given figure, ∠QRN = 40°, ∠PQR = 46° and MN is a tangent at R. What is the value (in deg) of x, y and z respectively?

If medians of a triangle have lengths 18 cm, 24 cm and 30 cm, then what is the area (in sq.cm) of the triangle?

5 hrs after a goods train passed a station, another train travelling at a speed of 70 km/hr following that goods train passed through that station. If after passing the station the train overtakes the goods train in 9 hours. What is the speed of the goods train?

The sum of a fraction and 10 times its reciprocal is 37/4. What is the fraction?

What fraction of 2 hours is 12 seconds?

30% discount is offered on an item. By applying a promo code the customer wins 5% cash back. What is the effective discount?