1331= lwh or 1331= x^3
So take cube root of both sides and you will get 11.
Since the formula for area is length times width, the answer is 11x11 which equals 121.
So the square area of the base is 121mm^2
224
-----
=1/7 (224)
=1/7(210 + 14)
=210 14
----- + ------
7 7
= 32
I think boys =18
girls=12
boys :x
girls:y
student:z
the number of group for the boys :n
the numberof group for the girls :m
so x=(3/5)*z
y=(2/5)* z
x/y=3/2
3y-2x=0
(1/10)*z*n=(3/5) *z
so n=6
(1/5)*z*m=(2/5)* z
put x=(1/10)*z*6
y=(1/5)*z*2
into 3y-2x=0 and z=30
z=30 so x=(1/10)*30*6=18
y=(1/5)*30*2=12
