A took 15 seconds to cross a rectangular field diagonally walking at the rate of 52 m/min and B took the same time to cross the same field along its sides walking at the rate of 68m/min. The area of the field is?
Pick.
A) 33  B) 60  C) 88  D) 27  E) 26
Explanation:   length of the diagonal = 52*(15/60)= 
<gadget id="calculator">52*(15/60)</gadget>
<output>13</output>
13m   sum of length and breadth= 68*(15/60)= 
<gadget id="calculator">68*(15/60)</gadget>
<output>17</output>
17m   \inline {\color{60lack}\sqrt{l^{2}+b^{2}}=13 \; or\; l+b=17 }   area =lb = 1/2[(2lb)] = 1/2[(l+b)² - (l²+b²)] = 1/2[17² -169]   =1/2*120= 
<gadget id="calculator">1/2*120</gadget>
<output>60</output>
60 sq meter   Answer: 60) 60
<result>B</result>
A took 15 seconds to cross a rectangular field diagonally walking at the rate of 52 m/min and B took the same time to cross the same field along its sides walking at the rate of 68m/min. The area of the field is?