Question

6. A rectangular field is 72 m by 58 m. Amar walks
round it at the rate of 3 km per hour. What time
will he take in taking 2 rounds.
please send me on explanation in this my questions?​

Answer 1

Answer:

Here it is !!

Step-by-step explanation:

Dimensions of a rectangular field= 72cm y 58cm

perimeter of the rectangular field= 2( l+b )

                                                   =2×( 72+58)

                                                   = 2×130

                                                   =  260cm

∴ Distance taken by Amar in taking two rounds= 2×260m

                                                                          = 520m

Speed of Amar= 3km/hr

                       =3×1000/3000 m/sec  

                       = 5/6 m/sec

Total time taken by Amar to cover the distance= Distance/speed

                                                                         = 520/5/6 = 520×5/6

                                                                         = 104×6

                                                                         = 104×6/60 min.

                                                                         = 10.4 min.

Answer 2

Answer:

Distance = 2rounds = 2 perimeter= 2×2×(72+58)

4×130= 520

Speed = 3km/h

Time= distance/speed = 520/3= 173.3sec