Advertisements
Advertisements
Question
A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the same?
Advertisements
Solution
Let the duration of each period, when there are 9 periods a day in the school, be x minutes. The following table is obtained:
| Duration of each period (in minutes) | 45 | x |
| Number of periods | 8 | 9 |
45 × 8 = x × 9
`x= (45 xx 8)/9 `
x = 40
Hence, in this case, the duration of each period will be 40 minutes.
APPEARS IN
RELATED QUESTIONS
1200 men can finish a stock of food in 35 days. How many more men should join them so that the same stock may last for 25 days?
Which of the following vary inversely with each other?
Two quantities are said to vary ______ with each other if an increase in one causes a decrease in the other in such a manner that the product of their corresponding values remains constant.
If two quantities p and q vary inversely with each other then ______ of their corresponding values remains constant.
If x varies inversely as y and when x = 6, y = 8, then for x = 8 the value of y is 10.
Write whether the following statement vary directly, vary inversely with each other, or neither of the two.
Compound interest on a given sum and the sum invested.
If x varies inversely as y and y = 60 when x = 1.5. Find x. when y = 4.5.
At a particular time, the length of the shadow of Qutub Minar whose height is 72 m is 80 m. What will be the height of an electric pole, the length of whose shadow at the same time is 1000 cm?
A packet of sweets was distributed among 10 children and each of them received 4 sweets. If it is distributed among 8 children, how many sweets will each child get?
Two persons could fit new windows in house in 3 days.
How many persons would be needed to fit the windows in one day?
