150 kg of wheat is stored for 20 hostel boys for 30 days. But 30 kg of wheat was wasted and 5 boys went home. With the remaining amount of wheat for how long will the remaining boys be fed?

In a flood relief camp, there is a provision of food for 4000 people for 190 days. After 30 days, 800 people went away elswhere. Find for how many days the remaining food lasts for the remaining people in this camp.

For mid-day meal of 500 students, 175 kg of rice is required for a week. After 75 kg of rice has been used, how long will remaining rice last for 400 sudents.

A class consists of 80 students, 25 of them are girls and 55 are boys. If 10 of them are rich and the remaining are poor and also 20 of them are intelligent, then the probability of selecting an intelligent rich girls is a. 5//128 b. 25//128 c. 5//512 d. none of these

A 10 kg boy standing on a 40 kg boat floating on water is 20 m from the shore of the river. If the boy moves 8 m on the boat towards the shore, then how far is he from the shore.(Assume there is no friction between water and boat)?

A boy of mass 20 kg , moved up to the top of a building of height 18 m , carrying a box of mass 2.5 kg. if he did this in 1.5 min, what was his rate of doing work ?

Out of 40 boys 30 can swim, 27 can play chess and only 5 can fo neither. How many can swim only ?

During retirement, Binoy get Rs. 1,96,150. He donated rs. 20,000 for school library and the remaining amount he devided among his wife, son and daughter in the ratio of 5 : 4 : 4 . Let's find how much money he gave each of them.

During retirement, Binoybabu get 1,96,150 rupees. He donated 20,000 rupees for school library and the remaining amount he divided among his wife, son and daughter in the ratio of 5: 4 : 4 . find how much money he gave to each of them.