Which of the following pairs are correctly matched ?

1. Christopher     - Hovercraft Cockerel!

2. David Bushnell - Submarine

3. J. C. Perrier     - Steamship

Select the correct answer by using the codes given below

m (1) 1, 2 and 3         0 (2) 1 and 2 only

m (3) 2 and 3 only     0 (4) 1 and 3 only
Ans. (1)

Exp. All the three combinations are correct.

5. What is the approximate mean velocity with which the earth moves round the sun in its orbit ?

m (1) 20 km/s            0 (2) 30 km/s

m (3) 40 km/s              0 (4) 50 km/s

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