Two trains are running at the speed 40 km/hr and 20 km/hr respectively in the same direction. The fast train completely passes a man sitting in the slow train in 5 seconds. The length of the fast train is

(a) 23 1⁄9 m

(b) 27 m

(c) 27 7⁄9 m

(d) 23 m

A shopkeeper allows 3 successive discounts of 50%, 40% and 20% respectively. Find equivalent discount?

(a) 66%

(b) 70%

(c) 60%

(d) 76%

A shopkeeper allows a discount of 10% on the marked price and gets a profit of 12%. Find the ratio of cost price and marked price.

(a) 45 : 56

(b) 40 : 113

(c) 45 : 59

(d) 48 : 51

Price of a diamond is directly proportional to the square of its weight. If the diamond break into 4 pieces by mistake, the ratio of their weight becomes 1 : 2 : 3 : 4, therefore loss will arise Rs 1,40,000. Find original price of the diamond?

(a) Rs 240000

(b) Rs 200000

(c) Rs 220000

(d) Rs 180000

The minimum value of 4 tan²θ + 9 cot²θ is equal to

(a) 0

(b) 5

(c) 12

(d) 13

If sin 7x = cos 11x, then the value of tan 9x + cot 9x is

(a) 1

(b) 2

(c) 3

(d) 4

A spider climbed 62½% of the height of the pole in one hour and in the next hour, it covered 12½% of the remaining height. If pole’s height is 192 m, then distance climbed in the second hour is

(a) 3 m

(b) 5 m

(c) 7 m

(d) 9 m

There are three inlet taps whose diameters are 1 cm, 3 cm and 5 cm respectively. The rate of flow of the water is directly proportional to the square of the diameter. It takes 7 minutes for the smallest pipe to fill an empty tank. Find the time taken to fill an empty tank when all the three taps are opened.

(a) 13 sec

(b) 15 sec

(c) 12 sec

(d) 10 sec

Given triangles with sides T₁ : 3, 4, 5; T₂ : 5, 12, 13; T₃ : 6, 8, 10; T₄ : 4, 7, 9 and a relation R in set of triangles defined as R = {(Δ₁, Δ₂) : Δ₁ is similar to Δ₂}. Which triangles belong to the same equivalence class?
(a) T₁ and T₂
(b) T₂ and T₃
(c) T₁ and T₃
(d) T₁ and T₄

Let R be a relation on the set L of lines defined by l₁ R l₂ if l₁ is perpendicular to l₂, then relation R is
(a) reflexive and symmetric
(b) symmetric and transitive
(c) equivalence relation
(d) symmetric

Given set A ={1, 2, 3} and a relation R = {(1, 2), (2, 1)}, the relation R will be
(a) reflexive if (1, 1) is added
(b) symmetric if (2, 3) is added
(c) transitive if (1, 1) is added
(d) symmetric if (3, 2) is added