Question

the dimensions of a field is 80m by 25m find the cost of fencing and ploughing the field at the rate of 2 rupees per metre and 5 rupees per metre respectively​

Answer 1

Answer:

Area of the field =80×25

Area =2000m²

cost of fencing = 2×2000

cost of fencing =4000

cost of ploughing =5×2000Rs

cost of ploughing =10000Rs

Answer 2

Given :

• Dimensions of field = 80m × 25m
• Rate of fencing = Rs 2/m
• Rate of ploughing = Rs 5/m²

To find :

• Cost of fencing the field
• Cost of ploughing the field

Formula used :

• Perimeter of rectangle = 2(length + Breadth)
• Area of rectangle = length × breadth

Solution :

Whenever someone mentioned fencing, we are required to find perimeter of field. And for ploughing we are required to find Area of field.

• Perimeter of field = 2(80m + 25m)

➝ Perimeter of field = 2(105m)

➝ Perimeter of field = 210 m

Now ,

• Cost of fencing = Perimeter of field × Rate of fencing

➝ Cost of fencing = 210m × Rs 2/m

➝ Cost of fencing = Rs 420

Cost of fencing = Rs 420 ______________________________________________

• Area of field = Length × breadth

➝ Area of field = 80m × 25m

➝ Area of field = 2000 m²

• Cost of ploughing = Area of field × Rate of ploughing

➝ Cost of ploughing = 2000m² × Rs 5/m²

➝ Cost of ploughing = Rs 10000

______________________________________________

ANSWER :

• Cost of fencing = Rs 420
• Cost of ploughing = Rs 10000