A policeman spotted a thief 200 meter apart. The thief starts running at the speed of 10km/hr. and e policeman chases him at the respectively 11 km/hr. Then find the distance between them after 6 minute -
(A) 80
(B) 90
(C) 100
(D) 110
A train of length 200 m crosses a platform of which is 50 m more than train in 18 sec. Find the speed of train.
(A) 20 m/s
(B) 25 m/s
(C) 30 m/s
(D) 28 m/s
(E) None of these
Two trains 108 m and 112 m in length are running towards each other on the parallel lines at a speed of 45 km/hr and 54 km/hr respectively. To cross each other after they meet, it will take
(A) 12 sec
(B) 9 sec
(C) 8 sec
(D) 10 sec
Megha invests an amount of Rs. 15,860 in the names of her three daughters A, B and C in such a way that they get the same interest after 2, 3 and 4 years respectively. If the rate of simple interest is 5 % p.a, then the ratio of the amounts invested among A, B and C will be –
(A) 6 : 7 : 8
(B) 6 : 5 : 4
(C) 5 : 10 : 12
(D)
A certain sum becomes Rs. 1020 in 5 years and Rs. 1200 in 8 years at simple interest. What is the value of principal?
(A) 700
(B) 720
(C) 820
(D) 780
Out of 5 men and 3 women. committee of 3 members is to be formed so that it has 1 woman and 2 men. In how many different ways can it be done?
(A) 20
(B) 10
(C) 23
(D) 30
(E) None of these
In how many different ways can letters of the word ‘SECOND’ be arranged?
(A) 720
(B) 120
(C) 5040
(D) 270
(E) None of the above
Number of letter in word ‘SECOND’ =6
The number of ways can the letters of word be arranged =6×5×4×3×2×1=720
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