Question

hi frnds pls solve this question fast. i will mark brainlist.

Answer 1

Hey Suzy,

Here is your solution :

Given,

⇒ Area of square = ( Side )²

⇒ 60025 m² = ( Side )²

⇒ Side = √ ( 60025 m² )

∴ Side = 245 m

As the man has to come back to starting point he will have to go through 4 sides i.e perimeter.

Now,

⇒ Perimeter of square = 4 × Side 

                                    = 4 × 245 m 

                                   = 980 m.

Now,

Speed of man = 18 km/h

                       = ( 18 × 1000 m ) / ( 60 × 60 s )

                      = 5 m/s

∵  It can cover 5 m in 1 sec.

∴  It will cover 1 m in ( 1/5 ) sec.

∴ It will cover 980 m in ( 1 × 980 / 5 ) sec

                                    = 196 sec



196 sec = 3.27 min ( approx ) = 0.054 hour ( approx ).


Hope it helps !!

Answer 2

side of square=a=√60025=245
245*4=980m
18kmph*5/18=5m/s
time=d÷s=980/5=196sec