Given \[\frac{1}{u}+\frac{1}{v}=\frac{1}{f},\] find the value of 'v' when \[f=20\] and \[u=30\].

Given \[\frac{1}{u}+\frac{1}{v}=\frac{1}{f},\] find the value of 'v' w

1.	Given \[\frac{1}{u}+\frac{1}{v}=\frac{1}{f},\] find the value of 'v' when \[f=20\] and \[u=30\].
A.	\[-20\]
B.	\[-60\]
C.	\[60\]
D.	\[-30\]
Answer» D. \[-30\]

Discussion

No Comment Found

Related MCQs

Match the following. Column-I Column-II (i) (a) (ii) (b) (iii) (c) (iv) (d)
The figure shows the selling price of pens in a shop. Vimal paid Rs. 50 for the purchase of a few pens and received \[Rs.\text{ }0.50\]in change. How many pens did Vimal buy?
DIRECTIONS(Qs. No. 15 to 18):Given below is a bar graph showing the heights of six mountain peaks. Readthe bar graph and fill in the blanks by choosing the correct option. Second highest peak is _______.
Which of these letters do not have rotational symmetry (r.s. \[\ge \,\,2\])?
A person travelled \[{{\frac{5}{8}}^{th}}\] of the distance by train, \[{{\frac{1}{4}}^{th}}\] by bus and the remaining 15 km by boat. Find the total distance travelled by him.
A number consists of two digits whose sum is 9. If 27 is added to the number, its digits are interchanged. Which of the given steps is CORRECT to find the number? Step 1: Let the unit's digit be x Step 2: Then, ten's digit \[=(9-x)\] \[\therefore \] Number \[=10\times (9-x)+x\] \[\Rightarrow \] \[90-10x+x=(90-9x)\] Step 3: Adding 27 to the number \[90-9x,\] we get \[117-9x~\] Step 4: Number with digits interchanged is \[10x+(9-x)=9x+9\] Step 5: \[117-9x=9x+9\] Step 6: Therefore unit's digit = 6 and ten's digit = 3 Step 7: Hence the number = 36.
A and B started a business investing $ 85000 and $ 15000 respectively. Find the ratio of profit or loss divided between A and B after 15 years.
If one-fourth of a number decreased by 12 is 30, what is the number?
P is a linear equation. How many solutions does P have?
How many faces, edges and vertices respectively does the given solid have?

Given \[\frac{1}{u}+\frac{1}{v}=\frac{1}{f},\] find the value of 'v' when \[f=20\] and \[u=30\].

Discussion

No Comment Found

Related MCQs

Reply to Comment