Anna walks around a square park of side 90m. mary walks around a rectangular park of length 80 m and breadth 60 m. each one makes four rounds. who covers less distance and by how much?

Mary covers less distance for  320 m

Step-by-step explanation:

Psqere=4a

Prect=2(a+b)

anna=4*4a (a=90m)

Anna=16*90=1440m

Mary=4*2(a+b)=8(a+b)=8*(80+60)=8*140=1120 m

anna-Mary=1440-1120=320m

Mary covers a lesser distance with 1120m

Step-by-step explanation:

For Anna: perimeter = 4L

L = 90m

Perimeter = 90×4

= 360m

Work for times round, the total distance will be = 4 × 360

= 1440m

For Mary: Perimeter = 2L + 2b

L = 80m, b = 60m

Perimeter = 2(80) + 2(60)

= 160 + 120

= 280m

For four times = 4 × 280

= 1120m

: Mary covers a lesser distance