In a college there are 10 periods per day each of 40 minutes. The students were protesting to reduce the number of periods but the Principal did not want to reduce the working hours. What should be the working hours of each period if Principal reduces the number of periods to 8?

30 minutes

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55 minutes

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50 minutes

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45 minutes

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Solution

The correct option is C
50 minutes

When number of periods is 10, time for each period is 40 mins.
Let the time for each period be x mins when number of periods is changed to 8.

AB = constant
$A_{1} \times B_{1}$ = $A_{2} \times B_{2}$

$\Rightarrow x = \frac{10 \times 40}{8} = 50 m i n u t e s$ .

The principal should make each period of 50 mins.

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In a college there are 10 periods per day each of 40 minutes. The students were protesting to reduce the number of periods but the Principal did not want to reduce the working hours. What should be the working hours of each period if Principal reduces the number of periods to 8?

The correct option is C 50 minutes When number of periods is 10, time for each period is 40 mins. Let the time for each period be x mins when number of periods is changed to 8. AB = constant A1×B1 = A2×B2 ⇒x=10×408=50 minutes. The principal should make each period of 50 mins.