Shaktiman saw a criminal at a distance of 150m. When Shaktiman started chasing him the criminal also started running. If the ratio of Speeds of Shaktiman to Criminal is 6:5. Then how much distance did Shaktiman run to catch the Criminal?
On a journey, across Bangalore, a cab averages 12 kmph for 60% of the distance, 15 kmph for 20% of it and 30kmph for the remainder. The average speed for the whole journey is :
A tap can fill a tank in 30 minutes another tap can empty it in 1.5 hours. if both the taps are opened at 11.40 am. then at what time will the tank be filled?
1 min. filling =1/30
1 min. empty=1/(1.5*60)
In 1 min. tank will be filled (1/30)-[1/(1.5*60)] = 1/30 - 1/90 = (3-1)/90 = 1/45
So tank will completely filled in 45 min. from the start
So 11:40 + 45 min = 12:25 PM
Robert purchased a machine for Rs. 80,000. After spending Rs.5000 on repair and Rs.1000 on transport he sold it with 125% profit. What price did he sell the machine?
The present age of a brother is 2 years more than four times the age of his sister. Two years hence, brother’s age will be 4 years more than twice the age of the sister. Find the present age of the brother.
Let the sister’s present age be ‘n’ years.
=> brother’s present age = (4n + 2) years
So, according to the question
(4n + 2 + 2) = 2 (n + 2) + 4
=> 4n + 4 = 2n + 8
=> n = 2
Hence, brother’s present age = (4n + 2) = 10 years