If a rhombus is re-shaped such that one of its diagonal increases by 2%, while other diagonal decreases by 2%. Find the percentage change in the area of rhombus.

There are two squares, and the ratio of their perimeters is 6:11. If the area of the first square is 324 cm^{2}, then what is the area of the second one?

Two neighbours have adjoining houses as shown below. The houses are fenced with one common side. If the cost of fencing is €55.40 per meter, find the total cost of fencing both the houses.

There are 28 students in a class, out of which 8 are girls. If a teacher randomly picks a student, what is the probability that the student picked is a boy?

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