Question
I. 2x 2 + 5x + 2 = 0 II. 4 y 2
= 1 In the following questions two equations numbered I and II are given. You have to solve both the equations. Give answer if;Solution
I. 2x2+5x+2 = 0 Pairs are 1,4 So by changing its signs & dividing by a i.e.2, we will get x = -1/2 , -2 II. 4y² = 1 y² = 1/4 y = ± 1/2 Hence, x ≤ y
A 250 litres mixture contains only water and phenyl in the ratio 3:2, respectively. If 60 litres of this mixture is replaced with 90 litres of alcohol, ...
- If a group of 8 boys and 12 girls can complete a task in 40 days, and a team of 4 girls alone can finish the same task in 80 days, how long will it take fo...
25 laborers working 7 hours daily can finish a road in 16 days. If 35 laborers work 8 hours each day, how many days are needed?
Jack is twice efficient as Jill and Jill can do a piece of work in 30 days. Jill started the work and after a few days Jack joined him. They completed t...
A’ and ‘B’ together can complete a work in 20 days while ‘A’ takes 25 days to complete the same work alone. If ‘C’ is 60% more efficient t...
A completes 37.5% of a task in 9 days, B finishes 44.44% of the same task in 8 days, and C accomplishes 66.67% in 8 days. How many days will it take for...
A can finish a job in 20 days while B can finish same job in 30 days. A and B both worked for 5 days and C joins them. In next 3.5 days, all three have ...
- Raj alone can complete a work in 25 days. Mohan is five times as efficient as Raj. Find the percentage of work completed by Raj and Mohan together in 5 day...
‘M’ is 60% more efficient than ‘N’. ‘N’ started the work alone and worked for 20 days and after that ‘N’ is replaced by ‘M’. If the ...
- Person A is twice as efficient as Person B. Person B can complete a certain task in 32 days, while Person C takes 4 days more than Person A to finish the s...
Relevant for Exams:
