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Start learning 50% faster. Sign in nowATQ, we can say that Let, Distance travelled by ‘Swift’ = 'x' km Distance travelled by ‘Swift’ = ('x' + 400) km According to the question, Time for which 'Alto' car travelled = Time for which 'Swift' car travelled Or, (x/30) = {(x + 400)/40} Or, 4x = 3x + 1200 Or, x = 1200 The distance between Dehradun and Delhi = 1200 + 1200 + 400 = 2800 km
5 positive numbers are written on a piece of paper. Sum of first 3 numbers is 50 and ratio of the 4th and the 5th number is 2:3. If difference between t...
The average of the first 6 numbers is 'x+40', the average of the next 8 numbers is 'x', and the average of the remaining 6 numbers is 'x−10'. If the a...
The ratio of number of girls to number of boys is 3: 2 in a class of 70 students. The average marks scored by the boys in Physics is 72 and the average...
The average number of taxis of three colours (black, white and yellow) in a taxi stand is 100. The number of black taxis is 80 more than that of yellow ...
S1 is a series of 5 consecutive prime numbers starting from the second lowest prime number. S2 is a series of 5 consecutive odd numbers whose first term...
The average weight of 12 students in a dance class is 45 kg. If the weight of 3 instructors is also included, then the new average weight of each person...
Average weight of 13 nurses is 40 kg. If the weight of one more nurse is included, then average weight is increased by 2 kg. Find the weight of the newl...
The average of 30 numbers is 55. The average of the first 15 numbers is 50 and the average of the last 12 numbers is 55. What is the average of 68, 74 a...
In an examination the average marks of Rohit is 60. If he got 15 more marks in science and 21 more marks in maths then his average would have been 66. F...
