Question
 If a car runs at 30 km/hr, it reaches its destination
late by 12 minutes but if runs at 44 km/hr it is late by 5 minutes. What is the correct time for the journey?Solution
Distance = Difference in time x (S1 x S2)/(S1 – S2) D = [12 – 5]/60 x {(44 x 30)/[44 – 30]} => (7/60) x (44 x 30)/14 => 11 km Time, T = D/S (take any one of the speed) => 11/30 = 11/30 x 60 = 22 minutes Then, correct time is 22 – 12 = 10 minutes
(X + 140) liters of mixture A contains milk and water only such that quantity of water in it is (X – 100) liters less than quantity of milk in it. 75%...
A Vessel if full of milk, 7 litre of milk is taken out and replaced by water. This process is repeated once more, find the initial amount of milk in the...
55 litres of a solution contains alcohol and water in the ratio 2:3. Water is added in the solution. The new mixture has a ratio of alcohol and water as...
- A container has a mixture of alcohol and water in the ratio 4:3. After removing 84 ml of the mixture and adding 168 ml of water, the quantity of water beco...
- An alloy consists of 35% gold, 40% silver, and 25% copper. How much gold should be added to 20 kg of the alloy so that the new alloy contains 50% gold?
A mixture contains 40 liters of milk and 60 liters of water. If 20 liters of the mixture are taken out and replaced by water, what is the percentage of ...
- 270 litres of mixture 'X' contains milk and honey, only in the ratio 7:2, respectively and 480 litres of mixture 'Y' contains milk and honey, only in the r...
- A solution has milk and water in the proportion 3:2. After removing 20 ml of this solution and adding 10 ml milk, the ratio becomes 4:1. Find the total vol...
150 litres of Mixture ‘A’ (water + alcohol) contains 32% water and remaining alcohol while 112 litres of mixture ‘B’ (milk + water) contains 20 ...
400 litres of mixture X contains acetone and glycerine in the ratio 11:14, respectively. 100 litres of the mixture is withdrawn and labelled as mixture ...
