Question
X and Y can complete a piece of work in 20 days. They
worked for 10 days and left. Z completed the rest of the work in 10 days. Find how long Z would take to finish 60% of the same work alone.Solution
ATQ,
Fraction of Work done by X and Y = (10/20) = (1/2)
Fraction of work done by Z = 1 - (1/2) = (1/2)
So, number of days taken by Z alone to complete the entire work = 10 Ă· (1/2) = 20 days
So, time taken by Z to complete 60% of the work = 20 Ă— 0.60 = 12 days
The distance between Rahul's house and the gym is 60 km. When travelling at ___ km/h, Rahul reaches the gym at his usual time. However, when he reduces ...
Ravi must go from Hyderabad to Delhi. The distance between Hyderabad and Delhi is 1,500 km. He decides to travel 25% of the distance on foot, 30% of the...
A boy goes to school at 7 km/Hr and return at a speed of 6 km/hr. If he takes 13 hrs in all. Find the distance from his village to school?
Two trains of lengths 120 m and 150 m are moving in opposite directions at speeds of 45 km/h and 30 km/h, respectively. How much time will they take to ...
A man covered a distance of 240 km in 4 hours on a bike. How much distance will he cover on a bicycle in 8 hours if he rides the bicycle at one-tenth th...
The speeds of Vishank and Karun are 60 km/hr and 90 km/hr. Initially, Karun is at a point P and Vishank is at a place Q. The distance between P and Q is...
Anshul lives on 18th floor and Keshav lives on 53th floor. Anshul goes up at a rate of 34 floors per minute and Keshav comes down at a rate of 36 floo...
A leopard is Chasing a deer that is positioned 12 km ahead. The leopard has a speed of 96 km/hr, while the deer's speed is 60 km/hr. If the leopard catc...
A car travels from point A to point B at a speed 20% slower than its usual speed and arrives 30 minutes late. If the distance between A and B is 150 km,...
- Speed of three friends P, Q and R are in the ratio of 7:6:5. If R covers a fixed distance in 40 minutes, how many minutes will P take to cover that same di...