A circular park has a path of uniform width around it. The difference between outer and inner circumferences of the circular path is 132 m. Its width is (take pi = 22/7)

In an examination 70% of the candidates passed in English, 80% passed in Mathematics, and 10% failed in both the subjects. If 144 candidates passed in both, the total number of candidates was

The average weight of a class of 24 students is 35 kg. If the weight of the teacher be included, the average rises by 400g. The weight of the teacher is

The present age of a father is 3 years more than three times the age of his son. Three years hence, father’s age will be 10 years more than twice the age of the son. The father’s present age is