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Two pipes A and B can fill a tank in 15 min and 20 min respectively. Both the pipes are opened together but after 4 min, pipe A is turned off. What is the total time required to fill the tank?
A. 10 min 20 sec
B. 11 min 45 sec
C. 12 min 30 sec
D. 14 min 40 sec
Pipes and Cisterns · Easy · 4 weeks ago
The average age of 15 students of a class is 15 years. Out of these, the average age of 5 students is 14 years and that of the other 9 students is 16 years. The age of the 15th student is____________?
A. 11 years
B. 14 years
C. 15 years
D. 15 2/7 years
Arithmetic Mcqs · Easy · 4 weeks ago
In a Circle of Radius 5 cm if AB and AC are two equal chords of length 6cm each, then the length of chord BC is___________?
A. 24/5 cm
B. 12/5 cm
C. 7/5 cm
D. None of these
Areas · Easy · 4 weeks ago
The area of the cardboard(in cm2) needed to make a box of size 25 cm * 15 cm * 8 cm will be__________?
A. 1390 cm2
B. 695 cm2
C. 1280 cm2
D. 1220 cm2
Volumes · Easy · 4 weeks ago
(84 ÷ 14 ÷ 2 ÷ 9) * ? = 33⅓
A. 100
B. 300
C. 90,000
D. 10,000
Simplification and Approximation · Easy · 4 weeks ago
If the price of the eraser is reduced by 25% a person buy 2 more erasers for a rupee. How many erasers available for a rupee?
A. 8
B. 6
C. 4
D. 2
Percentage Mcqs · Easy · 4 weeks ago
By selling Toffees at 20 for a rupee, a man loses 40 %. To gain 20 %, for one rupee he must sell?
A. 16 toffees
B. 20 toffees
C. 25 toffees
D. 24 toffees
Profit and Loss Mcqs · Easy · 4 weeks ago
A tank is filled by three pipes with uniform flow. The first two pipes operating simultaneously fill the tank in the same during which the tank is filled by the third pipe alone. The second pipe fills the tank 5 hours faster than the first pipe and 4 hours slower than the third pipe. The time required by the first pipe is?
A. 6 hrs
B. 10 hrs
C. 15 hrs
D. 30 hrs
Pipes and Cisterns · Easy · 4 weeks ago
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