a man can row a distance of 5 km in 60 min with the help of the tide. the direction of the tide reverses with the same speed. now he travels a further 20 km in 20 hours. how much time he would have saved if the direction of tide has not changed?
Options
A) 2	B) 8	C) 1	D) 6	E) 16
<gadget id="calculator">20 / 5</gadget>
<output>4</output>

<gadget id="calculator">20 - 4</gadget>
<output>16</output>

<result>E</result>
a man can row a distance of 5 km in 60 min with the help of the tide. the direction of the tide reverses with the same speed. now he travels a further 20 km in 20 hours. how much time he would have saved if the direction of tide has not changed?
subtract(20, divide(20, 5))
"explanation : he covered 5 km in 1 hour , so he might cover 20 km in 4 hours . but he took 20 hours . he would have saved 20 â € “ 4 = 16 hours . answer : e"