- AIt is not a whole number
- BIt makes the discriminant negative
- CTime cannot be negative
- DBoth roots are always kept
Step-by-Step Solution
A pipe cannot take a negative number of hours, so only fits the situation.
Answer: C) Time cannot be negative
In (time of a pipe, in hours), the roots are 10 and -3. Why is -3 rejected?
Class 10Quadratic Word Problems: Work and PipesQuadratic Equations
Master this chapter in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Quadratic Word Problems: Work and Pipes practice questions
More Class 10 Quadratic Word Problems: Work and Pipes practice
A and B together can do a job in 15 days. A alone takes 16 days less than B. How long…Two taps together fill a trough in 5 hours. One alone takes 24 hours longer than the…Two pumps together drain a tank in 12 hours. One pump alone takes 18 hours longer than…Two pipes fill a tank together in 14 hours. One alone takes 21 hours longer than the…Two taps together fill a tank in 3 3/4 hours. One alone takes 4 hours longer than the…