In a garden, there are 10 rows and 12 columns of mango trees. The distance between two trees is 2 meters and a distance of one meter is left from all sides of the boundary of the garden. What is the length of the garden ?

The rent of a guest house was Tk 50 per day for first three days Tk 100 per day for next 5 days and Tk 300 per...

A motorist travels to a place 150 m away at an average speed for 50 km and returns at 30 km per hour. What is...

The average of Selim's marks in 7 subjects is 75. His average in six subjects excluding Science is 72. How man...

What is the value of x if 4/x +3/5 = 10/x ?

If 3a+4b = 10 and 5a+3b=30, what is the average (arithmetic mean) of a and b ?

The number of marbles in Amin's collection is 80% of the number in Rahim's collection. If Rahim has 80 more ma...