CBSE Class 12 Applied Mathematics — Numbers, Quantification and Numerical Applications
All previous year questions from Chapter: Numbers, Quantification and Numerical Applications
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2026(2 questions)
- 21
A man in a boat goes 12 km downstream and comes back to the starting point by rowing non-stop in a total time of 3 hours. If the speed of the stream is 3 km/h, find the speed with which the man can row the boat in still water.
2 marks· B· Boats and Streams — Speed in Still Water - 26
(a) (i) Apply addition modulo to positive integers 17 and 13 for modulo 30. (ii) Find subtraction modulo 8 for numbers 11 and 3. OR (b) Three pipes A, B and C can together fill a tank in 8 hours. After working at it together for 2 hours, B is closed and A and C fill the remaining part in 9 hours. Determine the time in which pipe B alone can fill the tank.
3 marks· C· Modulo Arithmetic / Pipes and Cisterns