Advertisements
Advertisements
Question
Rashmi has a road map with a scale of 1 cm representing 18 km. She drives on a road for 72 km. What would be her distance covered in the map?
Solution
Let the distance represented on the map be x cm.
The given information in the form of a table is as follows.
| Distance covered on road in (in km) | 18 | 72 |
| Distance represented on map (in cm) | 1 | x |
The distances covered on road and represented on map are directly proportional to each other. Therefore, we obtain
`18/1 = 72/x`
`=> x = 72/18 = 4`
Hence, the distance represented on the map is 4 cm
APPEARS IN
RELATED QUESTIONS
Explain the concept of direct variation.
Fill in the blank in of the following so as to make the statement true:
If u = 3 v, then u and v vary .... with each other.
In 15 days, the earth picks up 1.2 × 108 kg of dust from the atmosphere. In how many days it will pick up 4.8 × 108 kg of dust?
Expenditure of a family to number of members of the family are in direct proportion
Assuming land to be uniformly fertile, the area of land and the yield on it vary ______
By travelling at a speed of 48 kilometres per hour, a car can finish a certain journey in 10 hours. To cover the same distance in 8 hours, the speed of the car should be ______.
For fixed time period and rate of interest, the simple interest is directly proportional to the principal.
A car travels a distance of 225 km in 25 litres of petrol. How many litres of petrol will be required to cover a distance of 540 kilometres by this car?
Ravi starts for his school at 8:20 a.m. on his bicycle. If he travels at a speed of 10 km/h, then he reaches his school late by 8 minutes but on travelling at 16 km/h he reaches the school 10 minutes early. At what time does the school start?
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?
