2391: Assertion (A) : A jet aircraft moving at Mach Number equal to 1 travels faster at an altitude of 15 km than while moving at mach number equal to 1 near the sea level.
Reason (R) : the velocity of sound depends on the temperature of the surrounding medium.
(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
2392: Angora wool is obtained from a breed of
(a) Rabbit
(b) Sheep
(c) Goat
(d) Fox
2393: What was the objectives of Home Rule Movement?
(a) Self government at all levels
(b) Eradication of evils like Sati in the Indian community
(c) Participation in Indian National Movement
(d) Boycott of foreign goods
2394: In India, the tax proceeds of which one of the following as a percentage of gross tax revenue has significantly declined in the last five years ?
(a) Service tax
(b) Corporation tax
(c) Excise duty
(d) Personal income tax
2395: Cyclist A starts down a road at a speed of 15 km/hour. Cyclist B starts 20 minutes later from the same spot at a speed of 20 km/hour. B will overtake A after __________
(a) 1 hour
(b) 1½ hours
(c) 2 hours
(d) 2½ hours