Quantitative Aptitude Quiz For RRB PO Mains 2021- 23rd September

Directions (1-5): The following pie-chart shows the percentage distribution of gift vouchers given by six different e-commerce company during festival seasons.
The table shows the ratio of male to female who got gift voucher.
Note: No. of gift vouchers = No. of total persons
Total gift vouchers = 60,000

Q2. If 10% females who got gift voucher by Flipkart got interchanged with 10% of males who got gift voucher by Amazon, then what is the total no. of persons (Male + Female) who got gift vouchers by e-bay, Amazon and Flipkart together?
(a) 38000
(b) 34000
(c) 36000
(d) 36500
(e) 32000

Q6. A train travelling at 72 km/hr crosses an another train having half its length and travelling in opposite direction at 63 km/hr in 15 seconds. Faster train also passed a railway platform in 50 second. find length of smaller train is what percent of length of platform ?
(a) 40%
(b) 35%
(c) 25%
(d) 30%
(e) 45%

Q7. Ankur invested X Rs. at the rate of 15% per annum on compound interest for two years and gets total interest of 5805 Rs. if Ankur invest (X + 7000) Rs. for another two year at additional rate of 5%, then what will be compound interest on that investment ?
(a) 10000 Rs.
(b) 11000 Rs.
(c) 12000 Rs.
(d) 15000 Rs.
(e) 18000 Rs.

Q8. A boat goes 28 km upstream and while returning downstream covered 25% more distance covered in upstream. If boat takes 4½ hr more to cover upstream than downstream. Find the speed of current (in km/hr), if speed of boat in still water is 2 ½ m/s?
(a) 6 km/hr
(b) 5 km/hr
(c) 3 km/hr
(d) 2 km/hr
(e) 7 km/hr

Q10. Pipe A can fill a tank in 45 hr, pipe B is 50% more efficient than A and pipe C can fill the same tank in 7.5 hr less than B. A and B opened together for X hr and closed after that and pipe C fill remaining tank in (X + 9) hr, if the ratio between tank filled by (A + B) together to tank filled by pipe C is 1 : 2. Find the value of X ?
(a) 3 hr
(b) 4 hr
(c) 6 hr
(d) 8 hr
(e) 7 hr

Solutions