Ajay and Bharti are initially 493 km apart. They start jogging towards each other with speeds of 36 km/h and 64 km/h, respectively, at the same time. If Ajay increases his speed by 6 km/h every hour and Bharti decreases her speed by 4 km/h every hour, find the time it takes for them to meet.
ATQ, Relative speed = 36 + 64 = 100 km/h Relative speed increases by 2 km/h (6 – 4 = 2) every hour Let they meet after ‘t’ hours, Relative speed in 1st hour = 100 km/h Relative speed in 2nd hour = 102 km/h So, relative speed will be as 100 km/h, 102 km/h, 104 km/h, 106 km/h, 108 km/h ........ Distance travelled in 4 hours = 100 + 102 + 104 + 106 = 412 km Distance remaining = 493 – 412 = 81 km Relative speed in 5th hour = 108 km/h Hence, desired time = 4 + 81/108 = 4.75 hours = 4 hours 45 minutes
A person spent 30% of his monthly income on food and 60% of the remaining on rent. If amount spent on rent is Rs 840, then find the amount spent ...
B invests 20% of his monthly salary on Travelling and 20% of remaining on Food. Again, he invested 25% of the remaining (after travelling and food expen...
A gets 36% of the full marks in an exam and fails by 90 marks. B gets 38% of the full marks in the same exam and he also fails by 72 marks. What is the ...
There are two slabs of income tax, 8% tax for income up to 3 lakh and 12.5% for income above 3 lakh. Akhil tried to evade tax by hiding some of the inco...
Monthly income of A and B is Rs. (x + 1500) and Rs. x, respectively. If monthly income of A is increased by 12.5% while that of B is decreased by 25% th...
If decreasing 90 by k% gives ihe same result as increasing 60 by k%, then k% of 120 is how much per cent of [(K + 20)% of 150]
In a company interview test, 65% of the students passed in the first round, and 55% passed in the technical round, while 15% of students failed in both ...
In an election two candidates participated. 10% voters did not vote. 11(1/9)% votes declared invalid and the winner got 75% of the valid votes. If he wo...
Milk contains 6% water. What quantity of pure milk should be added to 12 litres of milk to reduce the quantity of water to 3%?
Ajay spent 35% of his monthly income on rent and 48% of the remaining on food and the rest amount is saved by him which is Rs. 2873, then find the month...
