| Q1. |
The sum of first n even natural number is given by the relation s = n (n + 1).
Find n, if the sum is 420.
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| Q2. |
A farmer wishes to grow a 100 sq ft rectangular vegetable garden. Since he
has with him only 30 ft of barbed wire, he fences three side of the rectangular
garden letting compound wall of his house act as the fourth side fence. find the dimensions of his garden.
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| Q3. |
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A motor boat whose speed is 15 mph in still water, goes 30 miles down stream
and comes back to the point it started from in a total time of 4 hours 30 minutes.
Find the speed of the stream. |
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| Q4. |
Sum of two numbers is 52, If one of the numbers is 10 more than the other.
Find the smaller number.
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| Q5. |
There are 20 grapefruits in a box. The mass of the box is 2 kg and the mass of
each grape fruit is 0.3 kg. find the total mass.
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| Q6. |
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For every 30 swimmers there should be one lifeeguard. How many life guards
are required to supervise 120 swimmers.
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