Question

A 5m wide lawn is cultivated all along the outside of a rectangular plot measuring 60m*30m. Find the total area of the lawn.

Answer 1

total area of lawn will be 2800 m^2

Answer 2

Area of the lawn = Area of outer rectangle - Area of inner rectangle.  --- (1)


Measure of outer rectangle = length = 60 + 5 + 5 = 70m.

                                                  Width = 30 + 5 + 5 = 40m.


Area of outer rectangle = length * width

                                         = 70 * 40

                                         = 2800 sq.m.   --- (2)


Area of inner rectangle is given directly = 60 * 30 = 1800 sq.m.    -- (3)


Substitute (2) and (3) in (1), we get

Area of lawn = 2800m - 1800

                      = 1000 sq.m.


Hope this helps! :)