Q1. A vessel contains ‘x’ liter mixture of water and sanitizer in the ratio 5:6. If 22 liters of mixture is removed and 10 liter of sanitizer is added, then ratio of water to sanitizer becomes 1:3. Find the value x.
(a) 310/9
(b) 308/9
(c) 311/9
(d) 317/9
(e) 319/9
Q3. Boat A cover 210 km downstream in 5 hours. Ratio of speed of boat A in still water to speed of stream is 5:2 respectively. If speed of boat B in still water is 25% more than speed of boat A in still water, then find the time taken by Boat B to cover 297 km downstream.
(a) 6 hours
(b) 4 hours
(c) 6.5 hours
(d) 5.5 hours
(e) 8 hours
Q4. 270-meter-long train crosses a pole in 18 sec. If ratio of length of train to a platform is 18:7, then find the time taken by train to cross the platform (in sec.).
(a) 22 sec
(b) 28 sec
(c) 20 sec
(d) 18 sec
(e) 25 sec
Solutions
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