The answer is in the image
The solution is given in the image below
The wood before starting =12 feet
Left wood=6 feet
Wood used till now=12-6=6 feet
Picture frame built till now= 6/(3/4)
=8 pieces
Therefore, till now 8 pieces have been made.
30% of 420 are first year students
first year students = (30/100 )*420
=126 students
Student who are not in first year = 420-126
=294 students
Area of rectangle= L*b
here,
L=12.4 cm
b= 8.8 cm
A= L*b
= 12.4 * 8.8 = 109.12 cm^2
Given height of gymnasium is 5/6 height of 30 foot ball
therefore height of gymnasium=5/6 * 30
=25 feet
Volume of rectangular prism=length * width * height
Given,
length=3/8cm
breadth=5/8cm
height=7/8cm
therefore volume=(3/8)*(5/8)*(7/8)
=105/512 cm3
It will provide an instant answer!