Since BC is twice as long as PB, and QR=PC=36cm,
(a) PB= 36/3=12cm
Angle PRC (y) = 90 degrees - 58 degrees = 32 degrees
Angle ACD (x) = 45 degrees (Half of a right angle)
Therefore the sum of angle x and y will be:
(b) 32 degrees + 45 degrees = 77 degrees
13 (a) A:B:C=2:3:5
(i) C's share is (3/2)*12.40$=18.60$
(ii) Sum total=(2+3+5)* 12.40/2=62$
(b) ratio of length-x:y
total length of rope-p
length of rope xp/(x+y), yp/(x+y)
Difference in rope length=(x-y)p/(x+y)
The fourth answer is the correct option.
But, what is the physics behind this - we know ice have a temperature 0 degree and the spoon other end in surrounding ( air).
The spoon other end have a higher temperature.we know from physics that energy always flow from higher temperature to lower temperature.
Thus,the icy cold drink gains heat from the spoon.