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Start learning 50% faster. Sign in nowGalileo is often credited with being the first scientist to try to determine the speed of light. Galileo's experiment was carried out by the Accademia del Cimento of Florence, Italy, in 1667, with the lanterns separated by about one mile, but no delay was observed. The actual delay in this experiment would have been about 11 microseconds. The first quantitative estimate of the speed alight was made in 1676 by Romer.
A milkman mixed milk and water in an empty container in the ratio 12:7. The quantity of milk mixed was bought by the milkman at the rate of Rs. 37/litre...
A mixture contains ‘X’ liter milk and ‘Y’ liter water. If 30 liter of mixture is taken out and replaced with water, then the quantity of milk an...
A 65-litre mixture contains only water and oil in the ratio 3:2, respectively. If 35 litres of the mixture is replaced with the same quantity of oil, th...
A container contains Alcohol and water in ratio of 7:3 and Capacity of Container is 80 lit. If half of the Container is replaced with 13 lit of water th...
A vessel is completely filled with milk. If 57% of the milk is replaced with water then only 86 ml of milk will be left in the vessel. What is the total...
In a container containing 120 liters of pure petrol, 40 liters of petrol are drawn and replaced with the same quantity of diesel. This process is repeat...
A mixture contains 70 litres of milk and the rest water such that the ratio of the quantity of milk to that of water in the mixture is 7:3. How many lit...
160 ml of mixture A containing milk and water in the ratio of 3:2 respectively is mixed with another 160 ml of mixture B containing milk and water in th...
Mixture 'A' has only petrol and diesel in the ratio 5:4 respectively and mixture 'B has only petrol and diesel in the ratio 3:2 respectively. Mixtures '...
A 250 litres mixture contains milk and water in the ratio 4:1 respectively. If 20% of the mixture is replaced with the same quantity of water, then find...