Mathematics
Assertion (A): The internal area of cross-section of a pipe is 21 cm2. Water runs through this pipe at a speed of 5 km/h. The volume of water that runs through the pipe in 2 minutes = 21 cm2 x 5 km/h x 2 minutes
Reason (R): The volume of water that runs through the pipe in 2 minutes = area of cross-section in cm2 x speed of water through it in cm/s x time in seconds
- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.
Related Questions
Assertion (A): Two circles touch each other externally. The sum of their areas is 74π cm2 and distance between their centres is 12 cm. Then difference between their radii is 2 cm.
Reason (R): When two circles touch each other internally, then two centres and point of contact lie on the same line and distance between their centres equals to the difference between two radii.
- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.
Assertion (A): The ratio between the edges of three cubes is 2 : 3 : 4. The ratio between their volumes is 4 : 9 : 16.
Reason (R): The ratio between their volumes = 23 : 33 : 43 = 8 : 27 : 64.
- A is true, R is false.
- A is false, R is true.
- Both A and R are true.
- Both A and R are false.