Question

A path 7m wide run outside a circular park whose radius is 18m. Find the area of path

Answer 1

Area of path = Area of outer cirlce - Area of inner circle
here,
radius of inner circle is 18m
therefore,
area = pie r²
= 22/7*18² m²
radius of outer circle = radius of inner circle + 7m. r = 25m
now
area = pie r²
=22/7* 25²
area of path = 22/7*25² - 22/7*18²
=22/7* (25²-18²)
=22/7* (25 + 18) (25 -18)
= 22/7* (43) (7)
= 22/7* 301
= 946m²