Pipe A in fill a tank in 15 horurs Pipe A and Pipe B together can fill it in 10 hours Pipe B can fill 8 liters per minute. Find the capicity of the tank
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Two radioactive elements A and B are present in a mixture. Both are beta active. Half lives of A and B are 30 minute and 60 minute respectively. The i
Correct Answer - (a) `(1)/(2)` (b) `5.2xx10^(-11)`
2 Answers 1 views
A magnetic needle performs `20` oscillations per minute in a horizontal plane. If the angle of dip be `30^@`, then how many oscillation per minute wil
Correct Answer - `[21.5 min^(-1),15.2 min^(-1)]`
2 Answers 11 views
For a given sample, the count rate is `47.5alpha` particle per minute. After 5 minutes, the count is reduced to `27 alpha` particles per minute. Find
Correct Answer - `0.0019 s^(-1) 368.12 s`
2 Answers 3 views
The base of a cubical tank is `25 m xx 40 m`. The volume of water in the tank is increasing at the rate of `500 m^(3)//min`. Find the rate at which th
Correct Answer - `0.5 m//min`
2 Answers 1 views
Shiva can type `x` words per hour while Sreevias can type `y` words per hour. Shiva works for 5 hours per day and Sreenvias works for 7 hours per day.
Correct Answer - `5x + 7y ge 700`
2 Answers 1 views
Machine A can produce 6 items per hour and machine B can produce 11 items per hours. If machine A works for x hours and B works for y hours in a day a
Correct Answer - `6x + 11y le 200`
2 Answers 1 views
Pipe A can fill a tank in 40 minutes . Pies B can empty the tank in 30 minutes . If both the pipes are opened simultaneously when tank is half full, t
Correct Answer - empty
2 Answers 1 views
300 men can construct a200m long wall in 12 days working 8 hours a day. In how many days can 120 men construct 180 m long wall working 9 hours per day
\(\frac{M_1D_1H_1}{W_1}=\frac{M_2D_2H_2}{W_2}\) M1 = 300, D1 = 12, H1 = 8, W1 = 200 M2 = 120, D2 = ? H2 = 9, W2 = 180 \(\frac{300\times12\times8}{200}=\frac{120\times D\times7}{180}\) D = 24 days
2 Answers 1 views
Two pipes A and B can fill a tank in 20 and 24 minutes. Resepctively. Pipe C can empty the tank in 10 minutes. Pipes A and B are opened for 5 minutes
Correct Answer - 55 minutes
2 Answers 1 views
Oak tree can transpire as much as …… liters of water per day.
Oak tree can transpire as much as 900 liters of water per day.
2 Answers 1 views