In the month of March, Hiten spent 45% of his monthly salary on paying bill and rent. Out of the remaining salary, he invested 60% in PPF and the remaining he deposited in bank. He deposited Rs. 15,400 in bank. If in April, he got an increment of 10%, what was his salary in April?
Rs. 84,000
Rs. 77,000
Rs. 1,10,000
Rs. 59,000
Rs. 68,000
Answer: Option B.
Let the initial salary of Hiten be ‘S’. Then:
(0.55 × 0.4) S = 15400 => S = 70000
After increment, Hiten’s salary = 1.1 × 70000 = 77000.
A person covers a certain distance by travelling at a uniform speed of 120 km/h for 90 minutes. At what speed will he have to travel in order to cover the same distance in 1 hour 20 minutes? (in km/h)
135
125
140
130
145
Answer: Option A.
Distance = 120 × 90/60 = 180 km
Speed required to cover 180 km in 1 hr 20 mins ( 4/3 hrs) =
180 × ¾ = 135 km/hr.
The average weight of 8 person's increases by 2.5 kg when a new person comes in place of one of them weighing 65 kg. What will be the weight of the new person?
50% of a number is 18 less than two-third of that number. Find the number?
123
115
119
108
101
Answer: Option D.
Let the no. be x
Given : 50x/100 = 2x/3 – 18
½ x – 2/3 x = - 18
=> x = 108.
Running at the same constant rate, 6 identical machines can produce a total of 270 bottles per minute. At this rate, how many bottles could 10 such machines produce in 4 minutes?
648
1800
2700
2000
3080
Answer: Option B.
let the no of bottles be 'B'.Using chain rule:
(6*1)/270 =(10*4)/B => B = 1800.
A boat, whose speed in 15 km/hr in still water goes 30 km downstream and comes back in a total of 4 hours 30 minutes. What is the speed of the stream? (in km/hr)
10
6
5
4
15
Answer: Option C.
Speed of boat = 15 km /hrs .
let the speed of stream be 's'
Given : (30/ 15+s )+ (30 /15- s) = 9/2
solving we get ,s = 5 km/hrs
Six years ago, the ratio of the ages of Kunal and Sagar was 6 : 5. Four years hence, the ratio of their ages will be 11:10. What is Sagar's present age?
16 years
18 years
20 years
22 years
25 years
Answer: Option A.
let the age of kunal and sagar be k and s respectively
Given : k - 6 / s -6 =6/5 => 5k -6s = -6..........(1)
