Question
A man travels 400 km, partly by bike and partly by train.
If the speed of bike is 50 km/h and the speed of train is 100 km/h, and he covers 40% of the distance by bike, what is the average speed of the whole journey? (Round off to nearest integer)Solution
ATQ,
Time taken by bike = [(0.40 × 400)/50] = (160/50) = 3.2 hours
Time taken by train = [(0.60 × 400)/100] = (240/100) = 2.4 hours
Average speed = [(Total distance)/(Total time)] = [400/(3.2 + 2.4)] = (400/5.6) ~ 71 km/h
- A person deposits Rs. ‘x’ in savings scheme A and Rs. ‘x/2’ in scheme B. The interest rates are 7% p.a. and 6% p.a. respectively. If after 3 years ...
At what annual compound interest rate will a principal amount of Rs. 16,000 grow to Rs. 25,000 in 2 years?
Find the compound Interest on Rs. 8,000 @15 % p.a for 2 years 4 month Compounded annually?
A certain sum of money is invested at simple interest at a rate of R% per annum.
I) When it is invested at this rate R% for 5 years, the interest...
A certain sum amounts to ₹13200 after 4 years and to ₹16400 after 8 years at the same rate per cent p.a. at simple interest. The simple interest (in...
A invested Rs. ‘x’ in a scheme offering compound interest of 35% p.a. compounded annually. If at the end of 2 years, interest received by A was Rs. ...
A sum of money amounts to Rs 2420 in 2 years and Rs 2662 in 3 years at compound interest. Find the rate of interest per annum and the principal.
A took a loan of Rs.5680 at simple interest of 30% p.a. and invested the same money in a scheme at simple interest of 40% p.a. Find the profit earned by...
- A man puts Rs. 3,000 in a scheme and gets a simple interest of Rs. 540 in 2 years and 4 months. What is the rate of interest per annum?
A certain sum of money becomes 6 times of itself in 25 years at simple interest. In how many years does it become double of itself at the same rate of s...
Relevant for Exams:
