A steam engine can run at a speed of 24km/hr without any coach. The decrease in the speed of the engine is directly proportional to the square root of the number of coaches attached. With 4 coaches speed of the engine becomes 20km/hr. Find the number of coaches that can be exactly pulled by the engine.

A steam engine can run at a speed of 24km/hr without any coach. The de

1.	A steam engine can run at a speed of 24km/hr without any coach. The decrease in the speed of the engine is directly proportional to the square root of the number of coaches attached. With 4 coaches speed of the engine becomes 20km/hr. Find the number of coaches that can be exactly pulled by the engine.
A.	144
B.	143
C.	142
D.	243
E.	None of these
Answer» C. 142

Discussion

No Comment Found

Related MCQs

Naveen is twice efficient as Jindal and they can do a piece of work in 15 days. Jindal started the work and after a few days Naveen joined him. They completed the work in 11 days, from the starting. For how many days they work together?
Dinanath walked 12 km at a certain rate of speed and then 6 km further at a rate of 0.5 km/hr faster. If he had walked the whole distance at a faster rate of speed, his time would have been 20 minute less. How long did Dinanath take to walk the distance of 18 km at his original speed?
Ranchi - Patna Jan Shatabdi Express going from Ranchi to Patna and makes 5 stops on the way. 3 persons enter the train during the journey with 3 different tickets. How many different sets of tickets they may have had?
An ancient coin is made of Bronze, an alloy contains copper and tin in the ratio 5 : 1. Another coin is made of Brass, an alloy contains copper and zinc in the ratio 2 : 3. A new coin is formed by melting bronze and brass, such that equal amounts of copper came from brass and bronze. By what percent is the quantity of zinc present, more than the quantity of tin, in the new alloy?
My son and some of his friends were organising a picnic. They expected the expenditure to be Rs 500. They mobilised some more students. The number of children who actually went to the picnic increased by 5, the expenditure per head came down by five rupees. How many children went to the picnic?
A shopkeeper sold two books together at Rs. 1600 and the profit earned on 2nd book is 6% more than the profit earned on 1st book. If the total profit earned by the shopkeeper was Rs. 200 and the cost price of first book is Rs. 400, then find the selling price of the second book.
Container P and container Q contains water and milk in the ratio 5 : 7 and 6 : 5 respectively. 72 liters and 77 liters of mixture from container P and container Q, respectively is taken out and put into another container R. If initially container P contains 108 liters of mixture, then find the ratio of the amount of water present initially in the container P to the amount of water present in container R.
In an aeroplane, the total number of seats in a row is the greatest number that will divide 53, 83, 98, 188 and 233 so as to leave the same remainder. The total number of rows is 42. Find the maximum number of persons who can travel in the aeroplane?
Anshu and Sneha started a business with invstment of Rs. 1800 and Rs. 1600, respectively. After one year, Anshu decreased her investment by 15% while Sneha increased her investment by 20%. At the end of two years, total profit earned in the business was Rs. 5480, then find the share of profit of Sneha.
A shopkeeper sold an article at 30% profit. Had the shopkeeper sold the article at 15% loss then he would have earned Rs. 360 less. When shopkeeper sold the article at a profit of 30%, then at that time he allowed a discount 35%. Find the marked price of the article.

Discussion

No Comment Found

Related MCQs

Reply to Comment