A train covers a distance between station A and station B in 45 min.If the speed of the train is reduced by 5 km/hr,then the same distance is covered in 48 min.what is the distance between the stations A and B ?
Let 'd' be the distance and 's' be the speed and 't' be the time d=sxt 45 mins = 3/4 hr and 48 mins = 4/5 hr As distance is same in both cases; s(3/4) = (s-5)(4/5) 3s/4 = (4s-20)/5 15s = 16s-80 s = 80 km. => d = 80 x 3/4 = 60 kms.
A guy walks into a store and steals Rs. 100 from the store without the owner's knowledge. He then buys Rs. 60 worth of goods using that Rs. 100 and the owner gies Rs. 40 in change.
If 2 men and 3 women can do a piece of work in 8 days and 3 men and 2 women in 7 days. In how many days can the work be done by 5 men and 4 women working together?