Question
The daily wages of Happy and Sad respectively are Rs.
4.50 and 3.75. When Happy finishes a certain work, he gets a total wage of Rs. 162. When Sad does the same work, he gets a total wage of Rs. 225. If both of them do it together what is the cost of the work?Solution
Worked day of Happy = 162/4.5 = 36 Worked day of Sad = 225/3.75 = 60 Now, 
Required time = 180/8 = 45/2 days Cost of the work = 45/2 × (4.5 + 3.75) = 185.62 ixamBee Approach : Number of days Happy took to finish the work alone = 162/4.5= 36 Number of days Sad took to finish the work alone = 225/3.75 = 60 Happy’s one day’s work = 1/36 Sad’s one day’s work = 1/60 Work done in one day when Happy and Sad work together = 1/36+ 1/60= (5+3)/180= 8/180= 2/45 work Number of days to finish 2/45 work = 45/2=22.5 days Cost of the work = 22.5 × (4.5 + 3.75) = 185.62
Rahul invested a certain amount at a simple interest rate of 8% per annum, and after 6 years, it grew to Rs. 1,850. If he had instead invested the same ...
Jeevan borrowed an amount of Rs. 'x' from a bank. Out of this, he lent 25% of the borrowed amount to Jeshu at a simple interest rate of 20% per annum fo...
Find the compound Interest on Rs. 8,000 @15 % p.a for 2 years 4 month Compounded annually?
The difference between compound and simple interest on a sum of money for 2 years at 25% per annum is Rs. 880. The sum is:
Person K invested Rs. 4500 at a compound interest rate of 20% per annum (compounded annually) for 2 years, while person P investe...
A man invested certain sum at 8.5% p.a. simple interest for his son who was 20 years old. If the amount received by the son when he was 26 years old is ...
A person invested some amount at the rate of 12% simple interest and a certain amount at the rate of 10% simple interest. He received yearly interest of...
What will be the ratio of simple interest earned on certain amount at the same rate of interest for 6 years and that for 16 years?
Ankit invested a total of Rs. 63,000 between two SIPs: 'P', offering 10% compound interest compounded annually, and 'Q', offering 12% simple interest pe...
‘M’, ‘N’ and ‘O’, each of them invested Rs. 3500 at the rate of 12% p.a., 30% p.a. and 45% p.a., respectively for 7 years, 4 years and 5 yea...
Relevant for Exams:
