Advertisements
Advertisements
प्रश्न
Apple cost x rupees per dozen and mangoes cost y rupees per score. Write a formula to find the total cost C in rupees of 20 apples and 30 mangoes.
Advertisements
उत्तर
Cost of 2 apples = x rupees (1 dozen = 12)
Cost of 1 apple = `"x"/(12)"rupees"`
Cost of 20 apple = `(20"x")/(12)"rupees"`
Cost of 20 mangoes = y rupees (1 score = 20)
Cost of 1 mango = `"y"/(20)"rupees"`
Cost of 30 mango = `(30"y")/(20)"rupees"`
Total cost
= `(20"x")/(12) + (30"y")/(20)`
= `(20"x")/(12) + (3"y")/(2)`
= `(20"x" + 18"y")/(12)`
= `(10"x" + 9"y")/(6)`
As per the data: C = `(10"x" + 9"y")/(6)`.
APPEARS IN
संबंधित प्रश्न
The arithmetic mean M of the five numbers a, b, c, d, e is equal to their sum divided by the number of quantities. Express it as a formula.
Make a formula for the statement:"The reciprocal of focal length f is equal to the sum of reciprocals of the object distance u and the image distance v."
Make R2 the subject of formula R2 = 4π(R12 - R22)
Given: mx + ny = p and y = ax + b. Find x in terms of m, n, p, a and b.
If V = pr2h and S = 2pr2 + 2prh, then express V in terms of S, p and r.
Make y the subject of the formula x = `(1 - y^2)/(1 + y^2)`. Find y if x = `(3)/(5)`
Make g the subject of the formula v2 = u2 - 2gh. Find g, when v = 9.8, u = 41.5 and h = 25.4.
"The volume of a cylinder V is equal to the product of π and square of radius r and the height h". Express this statement as a formula. Make r the subject formula. Find r, when V = 44cm3, π = `(22)/(7)`, h = 14cm.
"The volume of a cone V is equal to the product of one third of π and square of radius r of the base and the height h". Express this statement as a formula. Make r the subject formula. Find r, when V = 1232cm3, π = `(22)/(7)`, h = 24cm.
The total energy E possess by a body of Mass 'm', moving with a velocity 'v' at a height 'h' is given by: E = `(1)/(2) "m" "u"^2 + "mgh"`. Find m, if v = 2, g = 10, h = 5 and E = 104.
