**1. If johnny can mow the lawn 30 minutes. With the help of his brother, Bobby, they can mow the lawn in 20 minutes. How long would it take Bobby working alone to mow the lawn ?**

(a) 1/2 hour

(b) 3/4 hour

(c) 1 hour

(d) 3/2 hour

(e) 2 hour.

**2. A tank is being drained at a constant rate.If it takes 3 hours to drain 6/7 of its capacity, how much longer will it take to drain the tank completely**

(a) 1/2 hour

(b) 3/4 hour

(c) 1 hour

(d) 3/2 hour

(e) 2 hours

**3. How many litres of a solution that has 30 percent salt must be added to a 50 liters that has 10 percent salt so that the resulting solution has 20 percent salt ?**

(a) 20

(b) 30

(c) 40

(d) 50

(e) 60

**4. A man can do a piece of work in 5 days. How may days will he take to complete 3 works of the same type?**

(a) 10 days

(b) 12 days

(c) 15 days

(d) 18 days

(e) None of these.

**5. 16 men can do a piece of work in 10 days. How many men are needed to complete the work in 40 days?**

(a) 1

(b) 2

(c) 3

(d) 4

**Answers :**

**4)**C

**5)**D

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