Question

10. The area of a rectangular field is 465 m² and its length is 31 m. Find the
a) breadth of the field.
b) cost of fencing it at the rate of 15.50 per metre.​

Answer 1

Answer:

a) solution:- area of rectangle=lb

l=31

A=465

lb=A

31×b=465

b=465÷31

b=15 m

so breadth of rectangle is 15m.

b)solution:- perimeter of rectangle=2(l + b)

=2(31+15)

=2(46)

=92 meter

so perimeter of rectangle is 92 meter

Now,

rate of fencing=Rs 15.50 per meter

so,cost of fencing 92 m= 92×15.50 =Rs 1426

Hence, cost of fencing rectangular field at the rate of 15.50 is Rs 1426.

Answer 2

Step-by-step explanation:

l=31

A=465

lb=A

31×b=465

b=465÷31

b=15 m

so breadth of rectangle is 15m.

b)solution:- perimeter of rectangle=2(l + b)

=2(31+15)

=2(46)

=92 meter

so perimeter of rectangle is 92 meter

Now,

rate of fencing=Rs 15.50 per meter

so,cost of fencing 92 m= 92×15.50 =Rs 1426

Hence, cost of fencing rectangular field at the rate of 15.50 is Rs 1426.