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Q16. The sum of three consecutive numbers is 48 . Find the numbers
(A) 15 , 16 , 18
(B) 15 , 16 , 17
(C) 14 , 16 , 17
(D) 13 , 14 , 15
Answer: 15 , 16 , 17
Explanation: Numbers are 15 , 16 , 17
Q17. A pipe can fill a tank in 6 hours and another pipe can empty the tank in 9 hours. If both pipes are opened together, how long will it take to fill the tank
(A) 14 hours
(B) 20 hours
(C) 18 hours
(D) 24 hours
Answer: 18 hours
Explanation: Time to fill the tank = ( 6×9)/( 9-6 ) = 18 hours
Q18. If 12 men can complete a work in 8 days, how many days will it take for 8 men to complete the same work?
(A) 15 days
(B) 10 days
(C) 12 days
(D) 8 days
Answer: 12 days
Explanation: Time taken by 8 men = (12×8)/8 =12 days
Q19. The population of a town increases by 5 % every year. If the present population is 20000 , what will be the population after 2 years
(A) 20050
(B) 20500
(C) 22500
(D) 22050
Answer: 22050
Explanation: Population after 2 years = 20000 × (105/100)×(105/100)= 22050
Q20. A train travels at 60 km/h and reaches its destination in 3 hours. How long will it take if the speed is reduced to 45 km/h
(A) 4 hours
(B) 5 hours
(C) 6 hours
(D) 3 hours
Answer: 4 hours
Explanation: Time taken = ( 60×3)/45 = 4 hours