Vikas covered a certain distance by bike. If he covers 40% of the distance at 40 km/h, 50% of the distance at 25 km/h and the remaining 10% distance at 10 km/h. Find his average speed over the whole distance.
ATQ, Let the total distance be 100x Now, Average speed = (100x)/[{(100x × 40%)/40}+{(100x × 50%)/25}+{(100x × 10%)/10}] = [100x/{(40x/40)+(50x/25)+(10x/10)}] = {100x/(x+2x+x)} = (100x/4x) = 25 km/h
In what ratio should coffee powder costing Rs 2500/kg be mixed with coffee powder costing Rs 1500/kg so that the cost of the mixture is Rs 2250/kg?
The ratio of the monthly expenditure to monthly income is 4:5. If the salary increased by Rs. 4550 such that ratio of old saving and new saving is 2:3, ...
Ratio of runs scored by A, B and C is 3:10:8, respectively. Total number of runs scored by the team is 200, which is four times the runs scored by B. Fi...
The radii of two solid right circular cylinders are 6 cm and 4 cm respectively and their heights are (h+1) cm and (2h+1) cm respectively. If the areas o...
In an orchard, the ratio of the number of mango and lichi trees is 4:7, respectively. Also, there are few apple trees in the orchard which is 50% more t...
A invested a certain amount in Debt and Equity mutual funds in the ratio of 5: 6 respectively. At the end of one year, he earned a total dividend of 40%...
The ratio of three numbers is 3 : 5 : 4 and the sum of their squares is 11250. Find the sum of the numbers .
The ratio of males and females in a zoo is 3:5 respectively and the percentage of children among males and the percentage of children among females are ...