Advertisements
Advertisements
Question
Make r2 the subject of formula `(1)/"R" = (1)/"r"_1 + (1)/"r"_2`
Advertisements
Solution
`(1)/"R" = (1)/"r"_1 + (1)/"r"_2`
⇒ `(1)/"r"_2 = (1)/"R" - (1)/"r"_1`
⇒ `(1)/"r"_2 = ("r"_1 - "R")/("r"_1"R")`
⇒ r2 = `("R""r"_1)/("r"_1 - "R")`.
APPEARS IN
RELATED QUESTIONS
The fahrenheit temperature, F is 32 more than nine -fifths of the centigrade temperature C. Express this relation by a formula.
The area A of a circular ring is π times the difference between the squares of outer radius R and inner radius r. Make a formula for this statement.
Make R the subject of formula A = `"P"(1 + "R"/100)^"N"`
Make L the subject of formula T = `2pisqrt("L"/"G")`
Given: mx + ny = p and y = ax + b. Find x in terms of m, n, p, a and b.
Make s the subject of the formula v2 = u2 + 2as. Find s when u = 3, a = 2 and v = 5.
Make x the subject of the formula a = `1 - (2"b")/("cx" - "b")`. Find x, when a = 5, b = 12 and
"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 pressure P and volume V of a gas are connected by the formula PV = C; where C is a constant. If P = 4 when V = `2(1)/(2)`; find the value of P when V = 4?
