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Rita invested a total of Rs. 13,200 in two different schemes A and B at the simple interest rate of 14% p.a. and 11% p.a. respectively. If the total amount of simple interest earned in 2 years be Rs. 3347.52, what was the amount invested in Scheme B?
14 × 2 × P/100 + 11 × 2× (13200 – P)/100 = 3347.52
(28 – 22)P = 334752 – 290400
6P = 44352
P = 7392
So Amount invested in B = 13200 – 7392 = 5808
Five years ago, the average age of Husband and Wife was 25. A son was born and the average age Family today is 21. What will be the age of son after five years?
Total age of Husband + Wife Today = 25 × 2 + 5 × 2 = 50 +10 =60
Total age of family = 21 × 3 = 63
Age of son at present = 63 – 60 = 3
After 5 year age of son = 5+ 3 = 8
If O is the centroid of the equilateral triangle PQR of perimeter 36 cm. Then find the length of OP?
If the cost price of 50 Balloons is equal to the selling price of 40 Balloons, then find the profit or loss percentage?
50 CP = 40SP
CP/SP = 4/5
CP < SP
% Profit = (5 – 4)/4 × 100 = 25 %
Find the unit place of the following
27 × 13 – 258 × 31
Unit place in 27 × 13 = 1
Unit place in 258 × 31 = 8
Unit place 27 × 13 – 258 × 31
= 11– 8 =3
A boat can cover a distance of 2 km upstream in 20 minutes and downstream in 8 minutes. What is the speed of the stream?
Upstream speed = 2 /1/3 = 6 km/hr
Downstream speed = 2/8 × 60 = 15km/hr
So speed of stream = (15 – 6)/2 = 9/2 = 4.5 km/hr
The difference between CI and SI for 3 years is 899. If the rate of interest is 10% then find the Principal?
Difference= P(r/100)2 × [(r+300)/100]
899 = P (10/100) 2 [310/100]
899 x 100 x 100 =P × 310
899000/31 = P
P = 29000
Directions For Questions
In the following graph number of students come in library from Monday to Friday is given. Read the graph carefully and answer the question
Number of Student Visit Library
...view full instructions
What is the ratio of student visited library on Tuesday to that who visited on Thursday?
Required Ratio = 215/480 = 43 : 96
Find the average of students who visited the library on Monday, Wednesday and Friday?
Require Average = (295 + 400 + 418)/3 = 1113/3 = 371
Students who visited library on Friday are how much percent more than the student who visited on Wednesday?
(418 – 400)/400 x 100 =18/4 = 4 1/2 %
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