A dealer marks his goods at such a price that after allowing a discount of 12.5% for cash payment, he makes a profit of 20%. What is the marked price (in rupees) of the article which costs him Rs. 210?

If (a+b)=16 and a³+b³=1456, then what is the value of ab?

A circular park whose diameter is 210 m has a 5 m wide path running around it(on the outside). What is the area ( in m²) of the path?

The average age of four sisters is 7 years. If the age of the mother is include, the average is increased by 6 years. Then the age of the mother is

The length of the two sides forming the right angle of a right-angled triangle are 6 cm and 8 cm, then find the length of its circum radius:

A man can row 10 km/h in still water. When the river is running at a speed of 4.5 km/h, then it takes him 2 h to row to a place and comes back to the initial point . How far is the place (in km) (rounded off to two decimal places)?

Two pipes of length 36 metre and 40 metre are to be cut into equal pieces without leaving any extra length of pipe. Find the number of such pieces if pipes are to be cut of maximum length.

A motorboat can travel at 10 km/hr. in still water it travelled 91 km downstream in a river and then returned taking at together 20 hours. Find the rate of flow of the river