| Direction: Each of the questions Mow consists of a questions followed by statements. You have to study the questions and the statements and decide which of the statement (s) is/are necessary to answer the question? |
| (I) The perimeter of the field is 110 metres. |
| (II) The length is 5 metres more than the width. |
| (III) The ratio between length and width is 6:5 respectively. |
A) I and II only
B) Any two of the three
C) I, and either II or III only
D) None of these
Correct Answer: B
Solution :
(b): I. \[1.2(l+b)=110\Rightarrow l+b=55\] II. \[l=(b+5)\Rightarrow l-b=5.\] III. \[\frac{l}{b}=\frac{6}{5}\Rightarrow 5l-6b=0\] These are three equations in l and b. We may solve then pair wise. \[\therefore \]Any two of the three will give the answer. \[\therefore \]Correct answer is (b).
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