An Aeroplane flies along a Square field @ 50, 100, 200 and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole journey?
Concept of Average Speed: LCM of 50, 100, 200 and 400 = 400 Now,Let side = LCM of 50, 100, 200 and 400 = 400 Now, Average Speed =total distance/ total time= (400 ×4)/(400/50+400/100+400/200+400/400) = (400 ×4)/15= 106.67 kmph
The cost of diamond varies directly as the square of its weight. A diamond broke into four pieces with weights in the ratio 3 : 4 : 5 : 6. if the loss i...
Two numbers are respectively 30% and 40% more than a third number. Find the ratio of two numbers.
Monthly savings of ‘Q’ is 25% more than that of ‘P’ and is 48% less than monthly income of ‘P’. Monthly expenditure of ‘Q’ is Rs. 3450 a...
In an office, the ratio of the number of males to number of females is 12:7. If 4 males joined the officeand 5 females left the office, then the ratio o...
Marks scored by A and B in a test are in the ratio 12:5 respectively. If B had scored 5 more marks, then marks scored by A would be 20% more than that o...
The ages of X and Y are in the proportion of 6: 5 and the total of their ages is 66. The proportion of their ages after 4 years will be:
There are some assistants and officers in an office, if 12 assistants leave then there are 2 officers for each assistant. After this again 36 officers g...
An amount of money is divided among L, M and N in the ratio of 2:3:6, respectively. If the amount received by N is Rs.6000 more than the amount received...
Some amount was divided among A, B and C in the ratio 4:5:8. If the share of A is 32 less than share of C, then find the 1/4th of total amount (in Rs).
A grandfather leaves Rs. 14,350 to be divided among 4 sons, 3 daughters and 3 grandson. If each daughter receives six times as much as each grandson and...
