In a team of four member (A,B,C and D)participating in a relay race the speed of four member are given as follows. A is twice as fast as B, B is thrice as fast as C .and C takes of time as taken by D to complete the 400m in a 1600 m relay race. If D takes 10 minutes to complete 400 m ,find the time taken by team to complete the relay race.
If a sum of money is compounded quarterly at 5%, find the equivalent rate of interest per annum.
Anuj and Amit started running on a circular trace of 400m with a speed of 5km/hr and 8 km/hr from the same point in same direction. Find the time after which they will meet for the first time.
A man walks 6 km at a speed of 1 km/hr, runs 8 km at a speed of 2 km/hr, and goes by bus another 32 km. The speed of the bus is 8 km/hr. If the speed of the bus is considered as the speed of the man. Find the average speed of the man?
A person wants to plant trees at the edge of a circular field of radius 21 km at every 6 km of the distance. Find the number of trees he will have to buy for this purpose?
A train 260 m long passes a tunnel in 40 seconds moving with a speed of 108 km/h. Find the length of the tunnel.
In a to-and-fro journey, the speeds of the bus is 20 kmph and 15 kmph respectively. If it takes hours to complete the whole journey then which of the following will be the total distance traveled by bus?
A bacteria doubles itself every hour. After how many hours it will become eight times of itself?
A sum of money invested at 8% p.a. simple interest increases its value by 50% in t years. Find t?
Sonam covers 80 km of a journey at 8 km/h and the remaining 60 km of the journey in 4 hours. What is his average speed of the whole journey?
A bullock cart has to cover a distance of 80 km in 10 hours. If it covers half of the journey in 3/5 the time. What should be its speed to cover the remaining distance in the time left?
Amit invested an amount for 5 years getting interest at 11% per annum simple interest. But, due to some financial crises, he withdrew his entire sum after years. If the withdrawal was made after one year, he would have got Rs. 412.50, extra interest. What will be the sum invested by A?
A man is driving to his office with 9/10th of his usual speed and covers a certain distance in 20 min more than the time he takes to cover the distance at his usual speed. The time taken by him to reach his office with usual speed is
A man invests his saving in two scheme A and B. Scheme A return at 6% p.a. simple interest and Scheme B returns at 7% p.a. simple interest. After two years he received interest of Rs 354 from the two schemes. If 25% of the first sum is equal to 20% of the second sum, find the total sum invested?
A boat sailing at the speed of X kmph covers a distance of 4.8 km downstream in 8 minutes. The same boat while sailing upstream at same speed covers the same distance in 9 minutes. What is the speed of the stream?
