Symbiosis National Aptitude Test SNAP 2013 Paper

Question : 5 of 150

Marks: +1, -0

The cost of fencing a circular plot at the rate of ₹ 15 per m is ₹ 3300. What will be the cost of flooring the plot at the rate of ₹ 100 per sq m?

Solution:

Circumference of circular plot =

{3300}/{15}

= 220
⇒ 2πr = 220
∴ r =

{220}/{2×22} × 7

{55×7}/{11}

= 35 m
Total cost of flooring the plot =

πr^2

× 100
=

{22}/7

× 35 × 35 × 100
= ₹ 385000

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