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The area of the base of a cuboidal tank is 8400 square centimetres and the volume of petrol contained in it is 10.2 cubic metres. Find the depth of petrol in the tank (correct up to one decimal place).

Surendra has a property having a certain value. He gives 60% of his property to his wife, 75% of the remaining property to his daughter, and the rest to a trust. If he gives property worth ₹6,00,000 to the trust, find the worth of the share of the property he gives to his daughter.

Two trains are running in opposite directions. They cross a man standing on a platform in 28 seconds and 10 seconds. respectively. They cross each other in 24 seconds. What is the ratio of their speeds?

What is the compound interest on a sum of Rs. 15,000 at 18% p.a. for $3 \frac{2}{4}$ years, interest compounded annually? (Round off your answer to the nearest integer.)

Solutions A and B contain acid to water in the ratio 4 ∶ 5 and 5 ∶ 7, respectively. Three litres of A is mixed with 5 litres of B. In 960 ml of this solution, how much acid (in ml) should be mixed so that the ratio of acid to water becomes 1 ∶ 1 in the resulting solution?

The marked price of an item is ₹1,900. The shopkeeper was offering it for a discount of 12% but on further bargaining agreed to offer a successive discount and finally he sold the item for ₹1,538.24. What was the second discount offered by him?

Evaluate the following:

$\sqrt[4]{0.00000081}-\sqrt[4]{0.00000256}+\sqrt{625}$

A bus has to travel from A to B. The bus covers the first one-third of the distance at 25 km/h and the next one-fourth of the distance at 30 km/h. For the rest of the journey, the bus travels at 50 km/h. The average speed of the bus (in km/h) for the entire journey is ______.

Simplify the following.

$\frac{2 \frac{3}{4}}{1 \frac{5}{6}} \div \frac{7}{8} \times\left(\frac{1}{3}+\frac{1}{4}\right)+\frac{5}{7} \div \frac{3}{4} \text { of } \frac{3}{7}$

The sum of all 4 - digit numbers which are divisible by both 3 and 5 is ______.