The speed at which a girl can row a boat in still water is 90 kmph. If she rows downstream, where the speed of current is 18 kmph, what time will he take to cover 330 metres?	Select:
A) 11	B) 12	C) 13	D) 14	E) 15
Speed of the boat downstream = 90 + 18= 
<gadget id="calculator">90 + 18</gadget>
<output>108</output>
108 kmph= 108 * 5/18= 
<gadget id="calculator">108 * 5/18</gadget>
<output>30</output>
30 m/s   Hence time taken to cover 330 m= 330/30= 
<gadget id="calculator">330/30</gadget>
<output>11</output>
11 seconds.   11nswer: 11
<result>A</result>
The speed at which a girl can row a boat in still water is 90 kmph. If she rows downstream, where the speed of current is 18 kmph, what time will he take to cover 330 metres?