A man walking at the speed of 4 km/hr,cross a square field diagonally in 3 minutes.The area of the field is?
A. 20000 sqm
B. 25000 sqm
C. 18000 sqm
D. 19000 sqm
Answer: Option A
Solution(By Examveda Team)
Speed of man, = 4 kmph = $$\frac{{4 \times 5}}{{18}}$$ m/sec In 3 min (180 sec) man will go = $$\frac{{20 \times 180}}{8}$$ = 200 m. That means the diagonal of the square field = 200 m. Diagonal of square, = Side of Square × $$\sqrt 2 $$ = 200 m. → Side of Square = $$\frac{{200}}{{\sqrt 2 }}$$ Area of Square = Side2 Area = $$\frac{{200 \times 200}}{2}$$ = 20000 sqm.Join The Discussion
Comments ( 1 )
Related Questions on Speed Time and Distance
A. 48 min.
B. 60 min.
C. 42 min.
D. 62 min.
E. 66 min.
A. 262.4 km
B. 260 km
C. 283.33 km
D. 275 km
E. None of these
A. 4 hours
B. 4 hours 30 min.
C. 4 hours 45 min.
D. 5 hours
Area of square iN terms of diagonal is
area =[(diagonal)^2]/2