Quantitative Aptitude - Arithmetic Ability Questions

A flask has two holes. The 1st hole alone makes the flask empty in 9 minutes and 2nd hole alone makes the flask empty in 16 minutes. If water leaks out at a constant rate, how long in minutes does it take if both the holes together empty the flask?

What is the reflection of the point (5 , -1) in the line y = 2?

AB is a chord of the circle and its center is “O”. ON is perpendicular to AB. If the length of AB=20 cm, ON-(2√11) cm, find the radius (in cm) of the circle.

If the selling price of an article is doubled, then its loss percentage gets converted into the equal profit percentage. What is the loss percentage?

What is the value of sin 330°?

For triangle PQR, find equation of altitude PS if co-­ordinates of P, Q and R are (1,2), (2,­-1) and (0,5) respectively?

The figure shown below consists of the tangents at the extremeties of any chord. Choose the correct option given below.

The number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is