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A man purchases two clocks A and B at a total cost of Rs. 650. He sells A with 20% profit and B at a loss of 25% and gets the same selling price for both the clocks. What are the purchasing prices of A and B respectively ?

If 15 pumps of equal capacity can fill a tank in 7 days, then how many extra pumps will be required to fill the tank in 5 days?

The misery index is the sum of a country’s unemployment and inflation rate. The higher the index, the more miserable is the country to live in. The figure given below is the Misery Index for various countries in Europe : Which of the following conclusions can be drawn from the misery index given above ? I. Britain is the most miserable country to live in. II. The inflation rate in Spain is less than that in Belgium and Britain. III. Italy and France seem to have almost identical unemployment rate. IV. The higher the misery index, the higher the inflation rate. Select the correct answer using the codes given below:

LMNOP, is a semi-circle with centre at R and diameter LP, LSR and RQP are also semi-circles with centres at T and U and diameters LR = RP = 1/2 LP. The ratio of perimeters of LMNOP and LSRQP is

Assertion (A) : Phenyl is used as a household germicide. Reason (R): Phenyl is a phenol derivative and phenol is an effective germicide.

Assertion (A) : Sodium metal is stored under kerosene. Reason (R): Metallic sodium melts when exposed to air.

Assertion (A) : The temperature of a metal wire rises when an electric current is passed through it. Reason (R): Collision of metal atoms with each other releases heat energy.

Assertion (A) : Formic acid is a stronger acid than acetic acid. Reason (R): Formic acid is an organic acid.

One Astronomical Unit is the average distance between

The complete conversion of glucose In the presence of oxygen into carbon dioxide and water with release of energy is called