1.A train 100 metres long moving at a speed of 50 km/hr. crosses a train 120 metres long coming from opposite direction in 6 sec. The speed of the second train is (2)
(a) 60 km/hr.
(b) 82 km/hr.
(c) 70 km/hr.
(d) 74 km/hr.
2.The sum of the ages of Puneet and his father is 45 years and the product of their ages is 126. What is the age of Puneet ? (1)
(a) 3 years
(b) 5 years
(c) 10 years
(d) 45 years
3.The ratio of two numbers is 3 : 4 and their HCF is 5. Their LCM is: (2)
(a) 10
(b) 60
(c) 15
(d) 12
4.A man sold 250 chairs and had a gain equal to selling price of 50 chairs. His profit per cent is: (2)
(a) 20%
(b) 25%
(c) 50%
(d) 15%
5.A sum of money placed at compound interest doubles itself in 5 years. It will amount to eight times of itself in: (1)
(a) 15 years
(b) 12 years
(c) 10 years
(d) 20 years