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APTITUDE

Aptitude solved Problems – 41
1. A train 100 m long is running at the speed of 60 km / hr. Find the time taken by it to pass a man standing near the railway line ?
A. 8 sec
B. 7 sec
C. 6 sec
D. 9 sec
E. 5 sec

Answer : C. 6 sec
Explanation :
Speed of the train = ( 60 * ( 5 / 18 ) ) m/sec
= ( ( 10 * 5 ) / 3 ) m/sec
= ( 50 / 3 ) m/sec
Distance moved in passing the standing man = 100 m
Required time taken = 100 / ( 50 / 3 )
= ( 100 * ( 3 / 50 ) ) sec
= ( 2 * 3 ) sec
= 6 sec
2.Arun and Sri invested in the ratio of 4 : 7 respectively. If both invested Rs. 46750 together, how much amount did Arun invest?
A. Rs. 17000
B. Rs. 17500
C. Rs. 16000
D. Rs. 16500
E. Rs. 16600

Answer : A. Rs. 17000
Explanation :
Sum of ratio = 4 + 7
= 11
Total investment = 46750
Arun’s investment = 46750 * ( 4 / 11 )
= 4250 * 4
= Rs. 17000

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