A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m2; find the length of the diagonal of the courtyard?	Select.
A) 25 m	B) 11 m	C) 77 m	D) 86 m	E) 46 m
1 m2 ---- 1/2   ? ----- 600 =&gt; 1200 m2   4x * 3x = 1200 =&gt; x = 10   25 mnswer:25 m
<result>A</result>
A rectangular courtyard, the sides of which are in the ratio of 4:3, cost Rs.600 for paving at 50 p per m2; find the length of the diagonal of the courtyard?