A money lender lends â‚¹ 400/- for 3 years to a person and lends â‚¹ 500/- for 4 years to the other person at the same rate of simple interest. If altogether he receives â‚¹ 160/- as interest, what is the rate of interest per annum?
5%
7%
9%
10%
A.
5%
Let the rate of interest = r%
According to the question,
If the Arithmetic mean of 7, 5, 13, x and 9 is 10, then the value of x is
10
12
14
16
D.
16
According to the question,
A man sells an article at 15% profit. If he had sold it for â‚¹ 6/- more, he would have gained 18%. The main bought the article for
100
150
200
250
C.
200
Difference = (18% - 15%) = 3% .
According to the question,
3% of C.P. = 6
C.P. = Rs. 200
Ratio of A's age to B's age is 4 : 3. 'A' will be 26 years old after 6 years. The age of B now is:
2 years
12 years
21 years
15 years
D.
15 years
A's age before 6 years = (26 - 6) = 20 years
A : B = 20 : x
4 : 3 = 20 : x
x = 15 years.
A car moving in the morning fog passes a man walking at 4km/h in the same direction. The man can see the car for 3 min and visibility is upto a distance of 130 m. The speed of the car is:
7 km/hr
5 km/hr
B.
Let the speed of the car = x km/hr., Speed of man = 4 km/hr (given)
As they are moving in same direction,
∴ Relative speed = (x - 4) km/hr
Distance = (130/1000) km
Time = 3 min = (3 / 60) km.
Now,
A' salary was decreased by 50% and subsequently increased by 50%. How much percent does he lose?
25%
50%
No loss
A.
25%
Net percentage change:
A dishonest shopkeeper professes to sell goods at his cost price but uses a false weight of 950 gm for each kilogram. His gain percentage is:
10%
B.
Required gain percentage:
The lengths of diagonals of a rhombus are 24 cm and 10 cm, the perimeter of the rhombus (in cm) is:
52
56
68
72
A.
52
Side of a rhombus
∴ Perimeter of rhombus = 4 x side = 4 x 13 = 52 cm
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