If 5 students run a mile in 5 minutes, how much time will 50 students take to run a mile?

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10 man, working 6 hours a day can complete a work in 18 days. How many hours a day must 15 men work to complete the same work in 12 days ?

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Two taps A and B can fill a tank in 5 hours and 20 hours respectively. If both the taps are open then due to a leakage, it took 30 minutes more to fill the tank. If the tank is full, how long will it take for the leakage alone to empty the tank ?

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A train can travel 50% faster than a car. Both start lost about 12.5 minutes while stopping at the stations. The speed of the car is :

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A towel, when bleached, was found to have lost 20% of its length and 10% of its breadth. The percentage of decrease in area is :

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