Question
Ravi visits an electronics store with a certain amount
of money. He can buy 50 USB drives or 25 headphones with the money he has. However, he decides to save 20% of the amount for a concert ticket and buys 10 headphones and some USB drives. Calculate the percentage of USB drives he can now purchase out of the initial number of USB drives he could have bought.Solution
ATQ Let the amount of money with Ravi be Rs. '100a' So, the price of 1 USB drive = (100/50) = Rs. '2a' Also, the price of 1 headphone = (100/25) = Rs. '4a' ATQ; Amount retained for the concert ticket = 0.20 X 100a = Rs. '20a' Price of 10 headphones = 10 X 4a = Rs. '40a' Remaining amount = 100a - 20a - 40a = Rs. '40a' So, number of USB drives he can purchase now = (40a/2a) = 20 Therefore, required percent = (20/50) X 100 = 40%
A work can be completed by ‘A’ and ‘B’, alone in 15 days and 20 days, respectively. Find the number of days taken by ‘C’ to complete the sam...
A, B and C can complete a work in 10, 20 and 15 days respectively. A left the work 3 days before the work was completed and B left 1 days after A had le...
6 men and 10 boys can finish a task in 18 days. If each boy is between 1/3rd to equal the efficiency of a man, find the maximum and minimum number of da...
A, B, and C together can do a project in (64/7) days. B and C together need (96/9) days, and C alone completes half in 8 days. Fi...
A and B alone can complete a work in 15 and 30 days, respectively. 50% of the work is completed by C in 2x days, and the remaining work is completed by ...
If ‘P’ can complete a task in 24 days and ‘P’ with ‘Q’ together can finish it in 15 days, then how many days will ‘Q’ take to complete t...
12 engineers complete designing 180 blueprints in 15 days. If the goal is to complete 270 blueprints in 18 days, how many engineers are required?
‘X’ and ‘Y’ together can complete a work in 16 days, while ‘Y’ and ‘Z’ together can complete the work in 10 days. If ‘Y’ takes 20 da...
M and N, working in tandem, can successfully attain the sales target within a span of 15 days. Now, if N's efficiency is _______ percent less than that ...
A and B can complete a task in 6 days working together. A alone works twice as fast as B. If A works alone for 2 days and B finishes the rest, how many ...
Relevant for Exams:
