NCERT Exemplar Solutions
Class 6 - Mathematics - Unit 6: Mensuration - Problems and Solutions

Question 40

Goal: Find the cost of fencing per metre (i.e., cost for 1 metre).

Given:

• Perimeter (total length around the park) = 550 m
• Total cost of fencing = Rs 55,000

Idea: If the total cost is for 550 metres, then the cost for 1 metre is:

Cost per metre = (Total cost) ÷ (Total metres)

Write the numbers:

( ext{Cost per metre} = dfrac{55000}{550} )

Simplify step by step:

Remove one zero from top and bottom:

( dfrac{55000}{550} = dfrac{5500}{55} )

Now check: ( 55 imes 100 = 5500 )

So, ( dfrac{5500}{55} = 100 )

Therefore,

( ext{Cost per metre} = ext{Rs } 100 )