1. If the circumference of a circle increases from 4π  to 8 π , what changes occur in its area?

it doubles

it triples

it quadruples

it is halved.

2. A, B and C rent a pasture. A puts in 10 oxen for 7 months, B 12 oxen for 5 months and C 15 oxen for 3 months for grazing. If the rent of the pasture is ₹ 175/-, how much must C pay as his share of rent?

₹ 45

₹ 50

₹ 55

₹ 60

3. A reduction of 20% in the price of oranges enables a man to buy 5 orange more for ₹ 10/. The price of an orange before reduction was –

20 paise

50 paise

40 paise

60 paise

4. In an examination, a student who got 20% of the maximum marks fails by 5 marks. Another student who scores 30% of the maximum marks get 20 marks more than the pass marks. The necessary percentage required for passing is -

32%

23%

22%

20%

5. When 60 is subtracted from 60% of a number, the result is 60. The number is -

120

150

180

200

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