1971: A person travelled a distance of 50 km in 8 hours. He covered a part of the distance on foot at the rate of 4 km per hour and a part on a bicycle at the rate of 10 km per hour. How much distance did he travel on foot?

(A) 20 km
(B) 10 km
(C) 40 km
(D) 30 km
1972: Which reference to the Indian economy, consider the following activities:

1. Agriculture, Forestry and Fishing
2. Manufacturing
3. Trade, Hotels Transport and Communication
4. Financing, Insurance, Real Estate and Business services

The decreasing order of the contribution of these sectors to the Gross Domestic Product (GDP) at factor cost at constant prices (2000-01) is

(a) 3, 1, 2, 4
(b) 1, 3, 4, 2
(c) 3, 4, 1, 2
(d) 1, 3, 2, 4
1973: The tropical deciduous trees shed their leaves in summer:

(a) Leaves get dried up due to the excessive heat

(b) To prevent excessive loss of water through transpiration

(c) Because rainfall is inadequate

(d) Days are longer
1974: From the third century AD when the Hun invasion ended the Roman Empire, the Indian merchants relied more and more on the

(a) African trade

(b) West-European trade

(c) South-East Asian trade

(d) Middle-Eastern trade
1975: Quit India Movement was launched in:

(a) 1936

(b) 1941

(c) 1942

(d) 1947