A 240 m long train crosses a 300 m long platform in 27 seconds. What is the speed of the train in km/h?

In an alloy, the ratio of copper and zinc is 7 : 6. If 1,450 gm. of zinc mixed with in 14 kg 300gm. of an alloy, then the ratio of copper and zinc will be

A train passes two bridges of length 400 m and 200 m. in 50 seconds and 30 seconds respectively. The length of the train is-

A housewife saved ₹ 2.50 in buying a dress on sale. If she spent ₹ 25 for the dress, approximately how much percent she saved in the transaction? 

Mohan purchased an article and sold it for Rs 2817.50 and earned 15% profit on the cost price. What was the cost price of the article?

Marked price of an item is Rs 200. On purchase of 1 item discount is 22 % on purchase of 4 items discount is 33 % Rabia buys 5 items, what is the effective discount? 

Vikram comes office 9:00 AM in office . His start his house on 8:30 Am by Bike. The Average speed of his bike is 50 Km/hours. The find the distance between office and his house.?

If cos θ = $${1\over \sqrt{10}}$$, then tan θ is equal to.