A right triangle consists of two legs and a hypotenuse. The two legs meet at a 90° angle and the hypotenuse is the longest side of the right triangle and is the side opposite the right angle.
A) there are 3 times 1/3 in each hour: so we have to multiply the original number by 3: 3*13=39!!
b)
so, 13 pages in 1/3 of an hour
for this we have to divide the time needed for the 13 pages by 13:

so each page requires

of an hour, which is approximately 1.5 minutes.
A dog has sharp teeth so that it can eat flesh very easily, it has four legs, two ears, two eyes, a tail, a mouth, and a nose. It is a very clever animal and is very useful in catching thieves. ... Dogs are a very faithful animal. It has a sharp mind and a strong sense of hearing smelling the things.