The expression to go with the words is 2x6-9
D is answer.
Perimeter is 2x +3x +2x + 3x = 10x where x is unknown factor of distance.
So P = 10x
Velocity is 12 km/hr = .2 km/min
P =1.6 Km = 10x
x= .16 Km 3x = .48 km, 2x=.32 km
Area = .48 X .32 Km^2
= 153600 m^2
Answer is (d) P, Q , R
Any triangle has 3 vertices , after which its name is justified
10 is the least common multiple of 5 and 2