3271: A hollow sphere of radius R, a hollow cube of side R and a thin circular plate of radius R, made up of the same material, are all heated to 20°C above room temperature. When left to cool in the room, which of them will reach the room temperature first?
(a) Circular plate
(b) Cube
(c) Sphere
(d) All of them will reach the room temperature at the same time
3272: Running at a speed of 60 km per hour, a train passed through a 1.5 km long tunnel in two minutes. What is the length of the train ?
(A) 250 m
(B) 1000 m
(C) 1500 m
(D) 500 m
3273: The characteristic feature of virus is that
(a) It is made of fats.
(b) It multiplies only on dead animals.
(c) It multiplies only on hosts.
(d) It lacks chlorophyll.
3274: Assertion (A) : Cellulose is used in making shatter proof glass.
Reason (R) : Polysaccharides are not soluble in water.
(a) Both A and R are individually true and R is the correct explanation of A
(b) Both A and R are individually true but R is not the correct explanation of A
(c) A is true but R is false
(d) A is false but R is true
3275: Which of the following are associated with `Planning in India?
1. The Finance Commission
2. The National Development Council
3. The Union Ministry of Rural Development
4. The Union Ministry of Urban Development.
5. The Parliament
Select the correct answer using the code given below:
(a) 1, 2 and 5 only
(b) 1, 3 and 4 only
(c) 2 and 5 only
(d) 1, 2, 3, 4 and 5