Larry is 10 and his sister is 7 years old. in how many years time will their total age be 25 years?

In 4 years
10 years plus 4 years = 14
7 years + 4 years = 11
11+14= 25

Larry will be 35 and his sister will be 28

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's