1. In covering a distance of 30 km, Abhay takes 2 hours more than Sameer. If Abhay doubles his speed, then he would take 1 hour less than Sameer. Abhay’s speed is:
- 5 kmph
- 6 kmph
- 6.25 kmph
- 7.5 kmph
EXPLANATION
The correct option is A.
Let Abhay’s speed be x km/hr.
Then, 30/x −30/2x =3
⇒6x=30⇒x=5km/hr.
Q4. A can do a piece of work in 25 days, B can do it in 20 days. They started the work together but A left 5 days before the completion of the work. The work has finished in?
- 13 1/3 days
- 15 3/7 days
- 11 4/9 days
- 9 3/8 days
EXPLANATION
Answer: A
(x – 5)/25 + x/20 = 1
(4x – 20 + 5x)/100 = 1
9x – 20 = 100
9x = 120
x = 120/9 = 13 3/9 = 13 1/3 days
Q5. Ratio of the number of male employees to the total number of employees in a company is 5:8. If 200 female employees joined the company, then now the number of male employees in the company is 25% more than that of female employees, then find the number of female employees in the company finally?
- 800
- 500
- 1400
- None of these
EXPLANATION
Answer: A
The number of male employees=5x
The number of female employees=8x-5x=3x
5x/(3x+200)=5/4
20x=15x+1000
x=1000/5
x=200
The number of female employees=200*3+200=800
