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.
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 simple interest on a sum of money is the product of the sum of money, the number of years and the rate percentage. Write the formula to find the simple interest on Rs A for T years at R% per annum.
Make a formula for the statement:"The number of diagonals, d, that can be drawn from one vertex of an n sided polygon to all the other vertices is equal to the number of sides of the polygon less 3"
If V = pr2h and S = 2pr2 + 2prh, then express V in terms of S, p and r.
Make h the subject of the formula R = `"h"/(2)("a" - "b")`. Find h when R = 108, a = 16 and b = 12.
Make y the subject of the formula x = `(1 - y^2)/(1 + y^2)`. Find y if x = `(3)/(5)`
Make x the subject of the formula a = `1 - (2"b")/("cx" - "b")`. Find x, when a = 5, b = 12 and
Make y the subject of the formula `x/"a" + y/"b" `= 1. Find y, when a = 2, b = 8 and x = 5.
Make c the subject of the formula a = b(1 + ct). Find c, when a = 1100, b = 100 and t = 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 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"`. Make 'm' the subject of formula.
