Subject :IMO Class : Class 7
The figure below shows the rectangle ABCD (not drawn to scale). R is thrice the size of P and 1/2 the size of S. Q is twice the size of P. What fraction of the whole figure is the sum of Q and S?
A1/3
B2/3
C4/5
D6/5
explain
Ans 1:
Class : Class 8
Let P=x
Then 3x=R
1/2S=R or S=2R=2(3x)=6x
2x=Q
Q+S=?
ABCD=P+Q+R+S
=x+2x+3x+6x
=12x
(Q+S)/(ABCD)
=(2x+6x)/(12x)
=2/3