Find the area of a rectangular field if John walking at the speed of 48m/min took 20 seconds to cross the field diagonally and Harry walking at a speed of 72m /min took 15 seconds to cross the field along its sides.	Choices:	A) 64	B) 144	C) 34	D) 35	E) 40
SOLUTION :   The length of the diagonal = speed of John * time = (48/60)*20= 
<gadget id="calculator">(48/60)*20</gadget>
<output>16</output>
16m   Sum of the adjacent sides of the field= speed of Harry * time = (72/60)*15= 
<gadget id="calculator">(72/60)*15</gadget>
<output>18</output>
18m   Area of the field= (182 - 162) / 2 = 34m2   ANSWER IS 34
<result>C</result>
Find the area of a rectangular field if John walking at the speed of 48m/min took 20 seconds to cross the field diagonally and Harry walking at a speed of 72m /min took 15 seconds to cross the field along its sides.