Direction: Study the following pie-charts and line graph carefully and answer the questions given below: The pie-charts show the distance covered by boats moving upstream and downstream by different boats. And the line graph shows the speed of stream (in kmph) of different boats. Distance covered upstream = 2600 km
Distance covered downstream = 1800 km
A) \[15\frac{2}{11}hrs\]
B) \[10\frac{3}{11}hrs\]
C) \[12\frac{6}{11}hrs\]
D) \[18\frac{1}{9}hrs\]
E) None of thee
Correct Answer: E
Solution :
\[\because 2\equiv 16\] \[\therefore \]\[3\equiv \frac{16}{2}\times 3=24=\] Speed of boat F Distance travelled by boat F upstream \[=\frac{17}{100}\times 2600=442\,km\] Distance travelled by boat F downstream \[=\frac{13}{100}\times 1800=234\,km\] Boat \[{{F}_{up}}=24-2=22\,kmph\] \[{{F}_{up}}=24+2=26\,kmph\] \[\therefore \] Average time taken by boat F upstream + downstream \[=\frac{\frac{442}{22}+\frac{234}{26}}{2}=\frac{\frac{221}{11}+9}{2}=\frac{221+99}{22}\] \[=\frac{320}{22}=14\frac{12}{22}=14\frac{6}{11}hours\]
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