For the following questions answer them individually
The cost of 23 tables is Rs. 52840. How many such tables can be purchased in Rs. 1690880?
The table given below shows the marks obtained by five students in an examination.
What is the ratio of marks obtained by D to the marks obtained by E?
What is the value of $$\frac{28}{21} \times \frac{96}{4} \div \frac{125}{5} \times \frac{42}{192} + \frac{297}{125} \times \frac{875}{3} \div \frac{99}{4} \times \frac{6}{25}$$?
If the ratio of the volumes of two cylinders is 7 : 5 and the ratio of their heights is 5 : 7, then what is the ratio of their radii?
A walks at a speed of 10 km/hr and 20 hours after his start, B starts on his cycle after him at the speed of 15 km/hr. How far from the starting point will B catch A?
A man covers half pan of a certain distance at 35 km/hr. He covers 40 percent of remaining distance at the speed of 8 km/hr and covers rest of the distance at the speed of 18 km/hr. What is his average speed for the entire journey?
Rashi can finish a work alone in 10 hours, Gopi alone in 8 hours and Manju alone in 12 hours. How long will they take if they worked together?