Question
Akhil and Nikhil together can complete a work in 10 days
while Nikhil alone takes 20 days to complete 40% of the work. If the efficiency of Sachin is 25% more than that of Akhil, then find the time taken by Sachin alone to complete the whole work.Solution
Time taken by Nikhil to complete the whole work alone = 20/0.40 = 50 days Let the total work = 50 units Efficiency of (Akhil + Nikhil) = 50/10 = 5 units/day Efficiency of Nikhil = 50/50 = 1 units/day Efficiency of Akhil = 5 - 1 = 4 units/day Therefore efficiency of Sachin = 1.25 x 4 = 5 units/day Time taken by Sachin to complete the whole work alone = 50/5 = 10 days
Karan had Rs. 10000 with him. He invested 50% of the sum at 9% p.a. and the rest at 12% p.a., both at simple interest for 2 years each. Find the total i...
The difference between compound interest and simple interest on a sum for 3 years at 10% per annum is Rs 93. Find the principal.
The amount of a certain sum in 3 years at simple interest at x % p.a. is ₹5,472 and the amount of the same sum in 7(1/2) years at the same rate, at si...
- Find the compound interest earned on Rs. 35000 at 11% per annum, compounded half yearly, after 1 year.
Rohit deposited Rs. ‘x’ in a bank at 8% compound interest per annum for 3 years, compounded annually. If he earned an interest of Rs. 2,597.12, find...
A sum is lent on compound interest for 2 years at 13% p.a. If the compound interest on the sum is Rs.3045.9, find the sum.
A sum of Rs. 3700 is invested at simple interest for 2 years. If the rate interest for first year is 12% p.a. while 20% p.a. for second year, then find ...
Simple interest earned on an amount of Rs.1400 at rate of R% per annum after 3 years is Rs.210. Find the simple interest earned on an amount of Rs.1600 ...
A sum of 74000 is divided into two parts such that the simple interest on the first part for 3 years at 15% per annum is equal to the simple interest on...
Rs. 5,000 is invested in scheme ‘A’ offering simple interest of 16% p.a. and Rs. 6,600 in scheme ‘B’ offering simple interest of 9% p.a. What is...
Relevant for Exams:
