Methane is the primary component of natural gas.
A certain number of men can complete a work in 50 days. If 10 more men are added, the work can be completed in 40 days. Find the original number of men.
A parallelogram has two adjacent angles measuring 110° and 70°. What is the difference of the other two angles?
The ages of P, Q, and R are in the ratio 2:3:5. After 5 years, the sum of their ages will be 75 years. What are their present ages?
The sum of the ages of a father and his son is 50 years. Five years ago, the father's age was four times that of his son. What are their current ages? ...
Area of a rectangle is 96 m2 When the length of the same rectangle increased by 6 m and the breadth decreased by 3 m, then the area of the re...
Find the area of the triangle whose vertices are (3, 6), (– 3, 2) and (4, 1).
A woman is 4 times as old as her daughter. In 8 years, the woman will be twice as old as her daughter. What are their current ages?
The ratio of the ages of A and B is 3:4. Five years later, the ratio of their ages will be 4:5. What are their present ages?
A shopkeeper marks his goods 50% above the cost price but allows his customers a discount of 20% on the marked price. What is his actual profit if sell...
The value of 0∫π cos3x dx is –
