Exams

The ratio of total surface area and volume of a sphere is 1 : 7. This sphere is melted to form small spheres of equal size. The radius of each small sphere is 1/6th the radius of the large sphere. What is the sum (in cm2) of curved surface areas of all small spheres?

A series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.

Bit, Byte, Kilobyte, Megabyte, ?

Boxing is related to Ring in the same way as Tennis is related to

In human beings, the respiratory pigment is

Two particles with charges q1 and q2 are kept at a certain distance to exert force F on each other. If the distance is reduced to one-fifth, then the force between them is

Among four cars, weight of T1 is twice the weight of T2. Weight of T3 is half of the weight of T2. T4 is 25 kg heavier than T2, but 25 kg lighter thanT1. What is the difference (in kg) between the weight  of T4 and T3?

What is the resistance (in Ω) of an electrical component if a current of 0.2 A passes through it on application of 8 V of potential difference across it?

When Vijay sells 12 pens, he gains the selling price of 2 pens. Calculate his % profit?