The ratio between the speed of two trains is 5:6. If second train runs 540 km in 6 hours, then the speed of the first train is :

A, B and C started a business by investing Rs. 40,000, Rs. 50,000 and Rs. 60,000 respectively. After 8 months B withdrew Rs. 10,000. After one more month C withdrew Rs. 40,000. Find the ratio in which profit earned at the end of the year will be distributed.

Two bags of iron ore weight 180 kg 250 gm and 270 kg 50 gm respectively. How much iron ore (in gm) must be taken out from the first bag and added to the second bag so that weight of the first bag may then be two-third of the second bag ?

The sum of three numbers, namely, A, B and C is 156. The numbers A and B are in the ratio of 2:5, while B and C are in the ratio of 1:9. Find number B?

The sum of the fourth proportional of 4, 5, 16 and the mean proportional of 4, 16, is

A, B and C started a business by investing in the ratio 4:3:2. At the end of the year the profit earned was distributed among them in the ratio 8:9:10. Find the ratio of the durations of their investment.

2 years ago ratio of Sita and Prakash age was 5 : 8 respectively. After 4 years this ratio would become 2 : 3. Find the present age ( in years ) of Sita.