21. The area of a rectangular field is 880 sq metre. If its length is 40 metre, find the cost of fencing the field at 15 per metre.
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Answered by
1
Answer:
1860 rupees
Step-by-step explanation:
The area of a rectangular field is 880 sq. meter. its length is 40 meter.
∴ The breadth of the rectangular field is = 880/40 = 22 meter.
∴ The perimeter of the rectangular field is = 2 × (22 + 40) = 124 meter.
∴ The cost of fencing the field at 15 per meter is = 15 × 124 = 1860 rupees.
Answered by
1
Step-by-step explanation:
the are of rectangular=length×breadth
=40×b=880
=b=880/40
=b=22 metre
2(l+b)= 2(40+22)=2×62=124
124×15= 1860 ans
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