A car takes 8 hours to cover the distance 320 km. If the speed of the car is increased by 10 km, per hour how long will the car take to cover the same distance?
Jack sold 35 fans for Rs. 350 each. From the money he earned, he bought 25 wrist watches and 17 wall watches. If one wrist watch cost Rs. 150, find the cost of one wall watch.
Amelia buys 3 kg oranges and 5 kg apples and paid Rs. 325. Price of 1 kg apple is equal to the price of 2 kg oranges. If Amelia had bought 5 kg oranges and 7 kg apples, how much money she had to pay?
The price of 23 toys car is Rs.12880. The shopkeeper charges Rs. 15 extra on each car for fitting battery in the car how much John has to pay, if he buys 4 cars and got the battery fitted in all the cars?