the speed of the boat in still water in 12 kmph. it can travel downstream through 45 kms in 3 hrs. in what time would it cover the same distance upstream?	Pick:	A) 8 hours	B) 6 hours	C) 4 hours	D) 5 hours	E) 6 hours
<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<gadget id="calculator">15 - 12</gadget>
<output>3</output>

<gadget id="calculator">12 - 3</gadget>
<output>9</output>

<gadget id="calculator">45 / 9</gadget>
<output>5</output>

<result>D</result>
the speed of the boat in still water in 12 kmph. it can travel downstream through 45 kms in 3 hrs. in what time would it cover the same distance upstream?
divide(45, subtract(12, subtract(divide(45, 3), 12)))
still water = 12 km / hr downstream = 45 / 3 = 15 km / hr upstream = > > still water = ( u + v / 2 ) = > > 12 = u + 15 / 2 = 9 km / hr so time taken in upstream = 45 / 9 = 5 hrs answer : d