Question
If the price of rice has increased from Rs 40 per kg to
Rs. 60 per kg, by how much percent a person has to decrease his consumption so that his expenditure remains same.Solution
Let the consumption be 100 kg.
When price is Rs.40 per kg, then the expenditure = 100 x 40 = Rs. 4,000.
At Rs.60 per kg,
60 x consumption = 4000
Consumption = 4000/60 = 66.67 kg.
Required decreased % = 100 – 66.67 = 33.33%
More Profit and loss Questions
If sec A + tan A = 3 and sec A - tan A = (1/3), find the value of cos A.
In a right triangle ABC, angle B = 90°. If tan A = 3/4 and the length of the hypotenuse is 25 cm, find the area of the triangle.
- Find the value of sin²10° + sin²80° + cos²15° + cos²75°.
If A lies in the first quadrant and 6 tan A = 5, then the value of 8 sin A−4 cos A / cos A+2 sin A is :
Find the value of tan(75°) using the identity for tan(A+B).
If tanθ = x then find the value of cos 2θ?
Simplify:
8sin 27° sec 63° + 3cot 64° cot 26°
Relevant for Exams:
