1 .A fruit seller buys 240 apples for ` 600. Some of these apples are bad and are thrown away. He sells the remaining apples at ` 3.50 each and makes a profit of ` 198. The % of apples thrown away are ?
The cost price of 240 apples = `600
Profit = `198
Total selling price= 600 + 198 = `798
The selling price of each apple = `3.50
So, quantity sold = $798\over3.5$=228
Percentage apple thrown= $240-228\over240$x100
= 5%
2 .A number is increased by x% ; to get back to the original number, it is to be reduced by ?
A.$10x \over 100+x $%
B.$x \over 100+x $%
C.x%
D.$100x \over 100+x $%
9 .The perimeters of two similar triangles are 30 cm and 20 cm respectively. If one side of the first triangle is 9 cm. Determine the corresponding side of the second triangle
10 .The perimeter of a sheet of paper in the shape of a quadrant of a circle is 75 cm. It's area would be (Ï€=$22\over7$)
(A) 346.5 $cm^ 2$
(B) 693 $cm^ 2$
(C) 100 $cm^ 2$
(D) 512.25 $cm^ 2$