The average height of girls in a class is 5 ft and that of boys is 5.7 ft. If the average height of the students in class is 5.5 ft, what could be the possible strength of boys and girls respectively in the class.

The value of "A" varies in inverse proportion as the square of "B". If the value of "A" is equal to 40 , when...

The average age of the 20 aspirants of a class is 19.2 years. After some time two more aspirants join them and...

A cistern is normally filled with eater in 10 hours but takes 5 hours longer to fill because of a leak in its...

P and Q start a hotel . P left after 6 months. After the year ends, P gets Tk. 6000 as profit out of total pro...

A and B go cycling in the same direction with speeds of 6 km /hr and 12 km/hr. A car from behind passes them i...

The ratio of the present age of father to that of son is 7 : 2 after 10 years their ages will be in the ratio...