Question

2. A man does a job alone in 2 hours. His wife can do the same job alone in 4 hours. If they work
together, how much would they take to finish the entire job?
(A) 3 hours
(B) 2.5 hours
(C) 1.5 hours
hours
3 3
3. The average weight of 4 people is 150 lbs. If the heaviest man is removed and his wife is
substituted, the average weight drops to 140 lbs. What is the difference in the weights of the man
*****
(A) 10 lbs
(B) 60 lbs
(C) 80 lbs
(D) 40 lbs

A man invests 40% of his saving in the stock market. He invests 50% of the remainder in
property. If $15,000 is left over, what is the value of his total savings?
a (A) $20,000
(B) $50,000
(C) $60,000
(D) $90,000
Solve it with working?

Answer 1

Answer:

Question 1 in this series of questions

man do a work in 2 hour

therefore he complete the work in 1 hour equals 1/2

Step-by-step explanation:

same job is done by his wife in 1 hour equals 1/4

therefore if they both work together den the work in 1 hour will be completed in 1/2+1/4=3/4

therefore the work gets completed in 4/3 hours when they work together. 4/3=1.33hours