Question
In what proportion must a grocer mix sugar at Rs.12 a kg
and Rs.7 a kg so as to make a mixture worth Rs.8 a kg ?Solution
using Allegation 
required proportion is 1:4 alternatively (12(x)+7(y)) / (x+y) = 8 12x +7y = 8x+8y = 4x= y x/y = 1/4 hence 1:4
If 'P' reduces his speed by 40% of his original speed, he arrives at his destination 3 hours later than usual. How much time would he take to reach his ...
Ajay and Vishal left the place βXβ with different speeds which are in the ratio 7:6 respectively. Ajay left the place 36 seconds after Vishal. If af...
- Karan walks at a steady pace of 12 km/h and covers a certain distance in 10 hours. What speed must he maintain to complete the same journey in 6 hours?
A train passes an electrical pole in 14 seconds and passes a platform 360 m long in 50 seconds. Find the length of the train.
βAβ and βBβ started moving towards each other at same time with a speed of 22 km/hr and 33 km/hr, respectively. If the distance covered by βAοΏ½...
Person 'A' begins a journey from Punjab to Delhi, driving initially at 120 km/hr. Every 36 minutes, he reduces his driving speed by 5 km/hr. If the dist...
In a race spanning 900 meters, Runner A surpasses Runner B by 180 meters and Runner C by 270 meters. If B and C compete in a 320-meter dash, with C star...
A and B are travelling towards each other with a speed of 100 km/hr and 110 km/hr. If they started at same time and A covered 30 km less distance than B...
In a 200-metre race, βAβ beats βBβ by 15 seconds or 60 metres. Find the time taken by βBβ to finish the race.
Speed of a car and a bus is 20 km/h and 10 km/h, respectively. If the time taken by the car to cover a distance of β8xβ km is 1 hour less than time ...
