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Choose $1$ if the question can be answered by using one of the statements alone, but cannot be answered using the other statement alone.
Choose $2$ if the question can be answered by using either statement alone.
Choose $3$ if the question can be answered by using both statements together, but cannot be answered using either statement alone.
Choose $4$ if the question cannot be answered even by using both statements together.

On a given day a boat ferried $1500$ passengers across the river in twelve hours. How many round trips did it make?

1. The boat can carry two hundred passengers at any time.
2. It takes $40$ minutes each way and $20$ minutes of waiting time at each terminal.
1. $1$
2. $2$
3. $3$
4. $4$

1. if the question can be answered by using one of the statements alone, but cannot be answered using the other statement alone

" It takes 40 minutes each way and 20 minutes of waiting time at each terminal. "

this statement is required for answering question

boat ferried 1500 passengers across the river in twelve hours

40 minutes each way and 20 minutes of waiting time at each terminal

So, total time in one trip 40+40+20=100 min

In 100 min there are only 1 trip

then in 12*60=720 min there are 720/100= 7.2

i.e. 7 full trip done
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5.1k points

### 1 comment

So, how many round trips?

1