If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many da

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Question
If 7 spiders make 7 webs in 7 days, then 1 spider will make 1 web in how many days?
Options
A. 1
B. 3
C. 7
D. 14

Correct Answer

7

Explanation

Let the required number days be x.

Less spiders, More days (Indirect Proportion)

Less webs, Less days (Direct Proportion)

$\begin{array}{r} \begin{matrix} S p i d e r s & 1 : 7 \end{matrix} \\ \begin{matrix} W e b s & 7 : 1 \end{matrix} \end{array}\} ? ? 7 : x$

=> 1 * 7 * x = 7 * 1 * 7

=> x= 7

More questions

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Shankara buys a watch for Rs. 1,950 in cash and sells it for Rs. 2,200 at a credit of 1 year. If the rate of interest is 10% per annum, he _____ :
Options
A. gains Rs. 55
B. gains Rs. 50
C. loses Rs. 30
D. gains Rs. 30

5.
Rajan sold an articles for ? 6000 at a loss of 25%. Find the cost price.?
Options
A. ? 7500
B. ? 7200
C. ? 8000
D. ? 8500

6.
In which of the following cases, A = B?
Options
A. A = {12, 14, 16}, B = {16, 18, 20}
B. A = ?, b = {}
C. A = {x: x ? W and x < 1}, B = ?
D. A = {x: x is a day of the week beginning with S}, B = {Sunday}

8.
If two parallel lines are intersected by a transversal, then the bisectors of the two pairs of interior angles enclose a:
Options
A. Trapezium
B. Rectangle
C. Square
D. circle

10.
The length of minute hand of a wall clock is 7 cms. The area swept by minute hand in 30 minutes is?
Options
A. 147 sq. cm
B. 210 sq. cm
C. 154 sq. cm
D. 77 sq. cm

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