Answer:
Step-by-step explanation:
1+3+4 = 8
480 / 8 = 60
60 x 1 = 60 (concrete)
60 x 3 = 180 (sand)
60 x 4 = 240 (gravel)
60:180:240
We are given the
perimeter of isosceles trapezoid = 28 in
ratio of length of bases = 5:3
We are to find the lengths of sides of the trapezoid and the diagonal that bisects the angle at the base with a longer length
The formula for the perimeter of an isosceles trapezoid is
P = (1/2) (b1 + b2) h
We are given the ratio
b2/ b1 = 5 /3
b2 = 5/3 b1
Substituting
28 = (1/2) (5/3 b1) h
The height of the trapezoid is expressed in terms of b1
For the diagonal
d² = h² + [(b2 - b1) + (b2 - b1)/2]²
Express h and b2 in terms of b1 and diagonal can be expressed in terms of b1
It would be 6.66..... repeating
27-3 = 24
24/4 = 6 chairs
Each family brought 6 chairs each.
