Volume of the cone = 1/3 pi r^2 h r = 9 h = 14
Volume of a sphere = 4/3 pi r^3 you only need 1/2 of this so 1/2 4/3 pi r^3 = 4/6 pi r^3 r = 9
add them together
it is a rectangle of area 6 x 7
and a right triangle area = 1/2( 3 x 7) add these two together
From right triangle on the left height = 12
From right triangle on left the base 2 = 5 + 15 + 16
area = 1/2 (base1 + base 2) x height
= 1/2 (15 +(15+5+16) x 12 = 306 units2
6 people must shake hands with 5 other people = 30 handshakes
BUT each hand shake involves TWO people 30/2 = 15 handshakes
Distance is 2d
rate x time = distance
36t1 = 48(3.5-t1)
t1 = 2 hrs 2 hrs at 36 km/hr = 72 km
By just looking at it:
2 and 8 in one year they will be 3 and 9 trying to find a mathematical solution.....
x = y^3 and
x+1 = (y+1)^2
x+1 = y^2+2y+1
x = y^2+2y
y^3 = y^2 + 2y
y^3 - y^2-2y=0
y(y^2-y-2)=0
y(y-2)(y+1) = 0 y = 2 0 (throw out) -1 (throw out)
so y = 2 x = 8
DO NOT post questions more than ONCE !
DO NOT post questions more than ONCE !!!!!!
Very unclearly written question..... I will assume the ratio of car days to train days is 2:3 of 150 days.
this means that 2 out of (2+3) days were car-days 2/5 x 150 = 60 car-days
the remainder are train-days 150-60 = 90 train-days.
From the description a = x and b = 1/x b = 1/a or a = 1/b
a varies inversely as b (or b varies inversely as a )
