book Maths Puzzle Numerical Ability

Jim can fill a pool carrying buckets of water in 30 minutes. Sue can do the same job in 45 minutes. Tony can do the same job in 1 1/2 hours. How quickly can all three fill the pool together?

How do you solve this?

Read Solution (Total 0)

book Other Question

Can you help me on this? There are different parts to this question.
1) If the demand equation for a product is given by p= -2x+24, find the marginal revenue

2) If the cost eq If P is the midpoint of segment AB, find the coordinates of the missing point

P(1.2, 4.5) B(5.3, 1.9) I cannot figure this one out. Can you please help me? Thanks