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Start learning 50% faster. Sign in nowit is a very powerful test for testing the significance of the discrepancy between theory and experiment. It was given by Prof. Karl Pearson in 1900 and is known as the “chi-square test of goodness of fit” 
A car running with a speed of ‘x’ m/sec makes 7 rounds of a circular field having radius 21 metres, in 12 seconds. Find the time taken by car to cov...
X started to run from point ‘A’ to ‘B’ at a speed of 28 km/hr at 9:00 am and Y started to run from point ‘B’ to ‘A’ at a speed of 12 km/...
Peter, John and Mike run around a Circular track starting from the same point simultaneously and in the same direction at the speed of 36 kmph, 54 kmph ...
In a 500-metre race, ‘A’ beats ‘B’ by 10 seconds or 50 metres. Find the time taken by ‘B’ to finish the race.
The radius of a circular garden is 42 m. The distance (in m) covered by running 8 rounds around it, is: (Take )
A car travels at a speed of 60 km/h for the first 2 hours, then at 80 km/h for the next 3 hours, and finally at 100 km/h for the last 1 hour. What is th...
A person traveled 140 km in 3 hours. For the first 2 hours, he traveled at 60 km/h. What was his speed during the last hour?
A bicycle moves at 30 km/h and needs 9 hours to complete a journey. A van completes the same journey in 3 hours. If the bicycle's speed is increased by ...
A is cycling at an average speed of 24 km/hr such that he can reach a certain point at 12 noon. If he cycles at 48 km/hr, then he will reach the destina...
