1311: A and B start from the same point and in the same direction at 7 a.m. to walk around a rectangular field 400 m x 300 m. A and B walk at the rate of 3 km/hr and 2.5 km/hr respectively. How many times shall they cross each other if they continue to walk till 12 : 30 p.m?
(a) Not even once
(b) Once
(c) Twice
(d) Thrice
1312: Carpenter A can make a chair in 6 hours, carpenter B in 7 hours and carpenter C in 8 hours. If each carpenter works for 8 hours per day, how many chairs will be made in 21 days ?
(a) 61
(b) 73
(c) 67
(d) 79
1313: Which one of the following statements does correctly defines the term "drain theory" as propounded by Dadabhai Naoroji?
(a) That the resources of the country were being utilised in the interest of Britain
(b) That a part of India's national wealth or total annual product was being exported to Britain for which India got no material return
(c) That the British Industrialists were being given an opportunity to invest in India under the protection of the imperial power
(d) That the British goods were being imported to the country making it poorer day by day
1314: Which of the following distance-time graph (x - t) represents one-dimensinal uniform motion?
1315: Among the following commodities imported by India during the year 2001-02, which one was the highest in terms of Rupee value?
(a) Edible oil
(b) Fertilizers
(c) Organic and inorganic chemicals
(d) Pearls, precious and semi-precious stones