Advertisements
Advertisements
प्रश्न
A birthday party is arranged in third floor of a hotel. 120 people take 8 trips in a lift to go to the party hall. If 12 trips were made how many people would have attended the party?
Advertisements
उत्तर
Let the number of people attended the party be x.
| Number of people | 120 | x |
| Number of tips | 8 | 12 |
As the number of trips increases, number of people also increases.
∴ They are in direct proportion.
`(x_1)/(y_1) = (x_2)/(y_2)`
`120/8 = x/12`
x = `(120 xx 12)/8`
= 180
180 people attend the party in 12 trips
APPEARS IN
संबंधित प्रश्न
Complite the following table given that x varies directly as y .
| x | 5 | ... | 10 | 35 | 25 | ... |
| y | 8 | 12 | ... | ... | ... | 32 |
In a library 136 copies of a certain book require a shelf-length of 3.4 metre. How many copies of the same book would occupy a shelf-length of 5.1 metres?
Working 8 hours a day, Ashu can copy a book in 18 days. How many hours a day should he work so as to finish the work in 12 days?
A cistern has two inlets A and B which can fill it in 12 hours and 15 hours respectively. An outlet can empty the full cistern in 10 hours. If all the three pipes are opened together in the empty cistern, how much time will they take to fill the cistern completely?
The cost of 12 quintals of soyabean is 36,000 rupees. How much will 8 quintals cost?
Assuming land to be uniformly fertile, the area of land and the yield on it vary ______
The mass of an aluminum rod varies directly with its length. If a 16 cm long rod has a mass of 192 g, find the length of the rod whose mass is 105 g.
From the following table, determine if x and y are in direct proportion or not.
| x | 1 | 4 | 9 | 20 |
| y | 1.5 | 6 | 13.5 | 30 |
A bowler throws a cricket ball at a speed of 120 km/h. How long does this ball take to travel a distance of 20 metres to reach the batsman?
Many schools have a recommended students-teacher ratio as 35:1. Next year, school expects an increase in enrolment by 280 students. How many new teachers will they have to appoint to maintain the students-teacher ratio?
