edited by
820 views
0 votes
0 votes

The length of a rope, to which a cow is tied, is increased from $19$ m to $30$ m. How much additional ground will it be able to graze ? Assume that the cow is able to move on all sides with equal ease. Use $\pi = \frac{22}{7}$ in your calculations.

  1. $1696$ sq m
  2. $1694$ sq m
  3. $1594$ sq m
  4. $1756$ sq m
edited by

2 Answers

2 votes
2 votes

Option B. 1694 sq m

Area of circle = π$r^{2}$

Additional ground will cow be able to graze = Outer circle – Inner circle

= π$30^{2}$ – π$19^{2}$

=$\frac{22}{7}$[900 – 361]

 = $\frac{22}{7}$ * 539

1694

Answer:

Related questions

0 votes
0 votes
2 answers
1
Lakshman Bhaiya asked Mar 30, 2020
1,715 views
If $10$, $12$ and '$x$' are sides of an acute angled triangle, how many integer values of '$x$' are possible?$7$$12$$9$$13$
0 votes
0 votes
1 answer
2
Lakshman Bhaiya asked Mar 30, 2020
1,023 views
What is the measure of the radius of the circle that circumscribes a triangle whose sides measure $9, 40$ and $41$?$6$$4$$24.5$$20.5$
0 votes
0 votes
2 answers
5
Lakshman Bhaiya asked Mar 30, 2020
2,057 views
Arun and Barun are both athletes. However, Arun runs $25\%$ faster than Barun. He is able to allow Barun a lead of $7$ meters to end a race in scorching heat. What is the...