A milkman sold two of his buffaloes for 20,000 each,On one he made a gain of 5% and on the other a loss of 10%.Find his overall gain or loss.(Hint:Find CP of each)

A VCR and TV were bought for ₹8,000 each,The shopkeeper made a loss of 4% on the VCR and a profit of 8% on the TV.Find the gain or loss percent on the whole transaction.

A runner weighing 60 kg raises the CG of his body by 0.25 m during each step of 1 min length. If he runs for 6 km and there is loss of 10% of the energy due to friction of air etc. What is the total energy required by him from his intake of food ?

Two tall buildings are standing in front of each other at a straight separations of 10 m one of them is taller than the other by 9 m. A man is running on the roof top of taller at a speed of 9 m/s horizontally and jumps as such in the hope that he will land on the roof of the building with lower height. Find will be able to land ?

From a station two trains start at the same time. One train moves west and the other moves north. First train moves 5 km/hr faster than the second train. If, after 2 hours, the distance between the two trains is 50 km, find the average speed of each train.

Arya, Abhimanyu, and Vivek shared lunch. Arya has brought two sandwiches, one made of vegetabel and one of jam. The other two boys forgot to bring their luch. Arrya agreed to share his sandwiches so that each person will have an equal share of each sandwich. (a) How can Arya divide his sandwiches so that each person has an equal share?

Two stars of a binary system are separated by a distance of 20 AU with a period of revolution of 20 years. One of the two stars is 4 times farthest from the centre of mass of the other. Find masses of each star.

Arya, Abhimanyu, and Vivek shared lunch. Arya has brought two sandwiches, one made of vegetabel and one of jam. The other two boys forgot to bring their luch. Arrya agreed to share his sandwiches so that each person will have an equal share of each sandwich. (b) What part of a sandwich wil each boy receive?

A person writes a letter to four of his friends. He asks each one of them to copy the letter and mail to four different persons with instruction that they move the chain similarly. Assuming that the chain is not broken and that it costs 50 paise to mail one letter. Find the amount spent on the postage when 8th set of letter is mailed.

A circular park of radius 20m is situated in a colony. Three boys Ankur, Syed and David are sitting at equal distance on its boundary each having a toy telephone in his hands to talk each other. Find the length of the string of each phone.

If a shopkeeper bought 250 books for 75 each.He spent ₹500 on the binding of books.Then he sold it in ₹ 2000.Calculate the profit or loss percentage.