Father reduced the quantity of food bought for the family...
Father reduced the quantity of food bought for the family by 10% when he found that the cost of living had increased 15%. Thus the fractional increase in the family food bill is now
112
635
19300
7200
5100
Correct answer is D
Let the cost of living = y.
The new cost of living = y+15y100=1.15y
The food bill now = (1−90100)(1.15y)
= 1.035y
The fractional increase in food bill = (1.035−1)×100
= 351000=7200
How many sides has a regular polygon whose interior angle is 135°? ...
If the lines 3y = 4x - 1 and qy = x + 3 are parallel to each other, the value of q is ...
Each of the interior angles of a regular polygon is 140°. How many sides has the polygon? ...
What is the size of an exterior angle of a regular pentagon? ...
Solve the inequalities -6 ≤ 4 - 2x < 5 - x...
Given that 6x−yx+2y=2, find the value of xy...
Given that Y is 20cm on a bearing of 300o from x, how far south of y is x?...
What value of k makes the given expression a perfect square ? m2 - 8m + k = 0...