A boat moves upstream at the rate of 1 km in 25 minutes and down stream 1 km in 12 minutes. Then the speed of the current is : Choose the correct choice from the following options:	A) 1 kmph	B) 2 kmph	C) 3 kmph	D) 1.3 kmph	E) 3.5 kmph
Rate upstream = (1/25 *60)= 
<gadget id="calculator">(1/25 *60)</gadget>
<output>12/5 = around 2.4</output>
2.4 kmph   Rate dowm stream= 1/12 * 60= 
<gadget id="calculator">1/12 * 60</gadget>
<output>5</output>
5 kmph   Rate of the current= ½ (5-2.4) = 1.3 kmph   ANSWER:1.3 kmph
<result>D</result>
A boat moves upstream at the rate of 1 km in 25 minutes and down stream 1 km in 12 minutes. Then the speed of the current is :