Advertisements
Advertisements
प्रश्न
Meenakshee cycles to her school at an average speed of 12 km/h and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, her average speed should be ______.
पर्याय
`20/3` km/h
16 km/h
20 km/h
15 km/h
Advertisements
उत्तर
Meenakshee cycles to her school at an average speed of 12 km/h and takes 20 minutes to reach her school. If she wants to reach her school in 12 minutes, her average speed should be 20 km/h.
Explanation:
Given, speed of cycle = 12 km/h
Time taken by Meenakshee through cycle = 20 min
Then, total distance cover = `(12 xx 20)/60` = 4 km ...[∵ Distance = Time × Speed]
If Meeanakshee want to reach her school in 12 min, then her cycle speed should be `4/(12/60)` i.e. 20 km/h. ...`[because "Speed" = "Distance"/"Time"]`
Hence, 20 km/h
APPEARS IN
संबंधित प्रश्न
A car is travelling at the average speed of 50 km/hr. How much distance would it travel in 12 minutes?
A worker is paid Rs 210 for 6 days work. If his total income of the month is Rs 875, for how many days did he work?
A and B can finish a work in 20 days. A alone can do \[\frac{1}{5}\] th of the work in 12 days. In how many days can B alone do it?
A dozen bananas costs ₹ 20. What is the price of 48 bananas?
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 ______.
Two quantities are said to vary ______ with each other if they increase (decrease) together in such a manner that the ratio of their corresponding values remains constant.
In a camp, there is enough flour for 300 persons for 42 days. How long will the flour last if 20 more persons join the camp?
It is given that l varies directly as m. Write an equation which relates l and m.
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.
Shabnam takes 20 minutes to reach her school if she goes at a speed of 6 km/h. If she wants to reach school in 24 minutes, what should be her speed?
