Q. 11

Find the cost of

Answer :

We have to find the area of the trapezoidal field first then the rate of watering

As given


Parallel sides = 10m and 25m.


Distance between these two sides = 15cm = 0.15m.


( 1cm =


1cm = 0.01 m)


Area of trapezium is given by


= ×(sum of parallel sides)×(distance between them)


=


=


= 2.625m2


Total cost = Area of field rate of watering


Total cost = 2.625 4


Total cost = Rs. 10.5


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