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Shikha went to the market to purchase five fans. The cost of the first fan is 25% more than the second fan and price of third fan is 20% less than fourth fan and price of fifth fan is 16% more than price of fourth fan. Price of the fourth fan is 3/4th of the second fan’s price. If the average cost of the first three fans was Rs.35 more than of the last three fans. What is  the cost of the second costliest fan?
A fan running at a speed of 280 rpm circulates 105 m3/s of air in a mine. If the power input to the motor for driving the fan is recorded to be 75 kW, with the combined efficiency of fan and motor at 70%. If the fan pressure is to be increased by 200 Pa by changing the fan speed. the fan speed in rpm will become
Which of the following circuits are equivalent (i.e., they produce the same output for all inputs)? F = ab + bc + ca G = (a + b) (b + c) (c + a) H = NAND (NAND(a, b), NAND(b, c), NAND(c, a))
The fan drift pressure readings and fan quantities are measured to be 500 Pa and 65 m3/s respectively at the time when NVP aids fan pressure. On reversal, the fan delivers a quantity of 50 m3/s while acting against NVP with fan drift pressure of 600 Pa. Assuming that the NVP remains constant in both cases the total resistance of the mine in Ns2/m8 will be
A mine ventilation system consists of two splits A and B with resistances of 0.8 Ns2m-8 and 3.2 Ns2m-8, respectively as shown in figure. Trunk airways have resistance of 0.2 Ns2m-8. The main mine fan is generating pressure of 500 Pa.
Mine Ventilation mcq question image
The flows in the two splits are equalized by placing a booster fan in split B. Assume that the fan pressure does not change after installation of the booster fan. The size of the booster fan in Pa is
How many NAND circuits are contained in a 7400 NAND IC?
Which gate will a NAND gate be equivalent to when two inputs of NAND gates are shorted?
Sahil sold a fan to Ankit at a profit of 10%. Ankit sold the fan to Pulkit at a profit of 20%. If Pulkit pays Rs 330 for fan, then for how much (in Rs) Sahil bought the fan?
Gopal purchased a fan and a stool for a total Rs. 1500. He sold the stool at 40% profit and fan at 40% loss. If the selling price of fan and stool were the same, then what is the total loss percent incurred after selling both fan and stool?
Directios: In the question below three statements are given followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance with commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: Some Bat are Cap. Some Cap are Fan. No Fan is Bulb. Conclusions: I. Some Bat are Bulb. II. Some Cap is not Bulb. III. No Bat is Fan. IV. Some fan is cap