Question

Then length of a side square field 20 mtr cow tied corner means 7mtr long rope find area wch cow graze length rope doubled find increase grazing area

Answer 1

given the length of a side square field is 20 meter and a cow is tied with the rope at the corner of the square yard and the length of the Rope is a 7m
now,
to find the area grazed if the cow is tied with a rope at the corner then it graze area is like the quadrant of a circle it is shown in the figure given up
now,
the area of quadrant is equal to
$\pi r square \div 4$here r =7m
the area great equal to 22/7*7*7/4
=154/4
=38.5m square
now the length of rope is doubled so the length of rope is a 14 metre so r is changed
new r is 14m
fill the values
=22\7*14*14\4
=154msquare