Advertisements
Advertisements
प्रश्न
A man travelled 60 km by car and 240 km by train. Find what per cent of total journey did he travel by car and what per cent by train?
Advertisements
उत्तर
Distance covered by car = 60 km
Distance covered by train = 240 km
∴ Total journey = 60 + 240 = 300 km
Let x% of total journey is travelled by car.
Then, x% of 300 = 60
⇒ `x/100 xx 300 = 60`
⇒ `x = (60 xx 100)/300`
⇒ x = 20%
Let y% of total journey is travelled by train.
Then, y% of 300 = 240
⇒ `y/100 xx 300 = 240`
⇒ `y = (240 xx 100)/300`
⇒ y = 80%
Hence, 20% distance is travelled by car and 80% distance Is travelled by train.
APPEARS IN
संबंधित प्रश्न
An alloy contains 32% copper, 40% nickel and rest zinc. Find the mass of the zinc in 1 kg of the alloy.
A number 5.78 x 103 is wrongly written as 5.87 x 103; find the percentage error
A’s income is 25% more than B’s. Find, B’s income is how much percent less than A’s.
A number increased by 15% becomes 391. Find the number.
A tank can hold 50 litres of water. At present, it is only 30% full. How many litres of water shall I put into the tank so that it becomes 50% full?
Find the percentage change from the first quantity to the second:
50 cm, 45 cm
Find the number that is 30% less than 70
Sunscreens block harmful ultraviolet (UV) rays produced by the sun. Each sunscreen has a Sun Protection Factor (SPF) that tells you how many minutes you can stay in the sun before you receive one minute of burning UV rays. For example, if you apply sunscreen with SPF 15, you get 1 minute of UV rays for every 15 minutes you stay in the sun.
A label on a sunscreen with SPF 30 claims that the sunscreen blocks about 97% of harmful UV rays. Assuming the SPF factor is accurate, is this claim true? Explain.
`(25% "of" 50% "of" 100%)/(25 xx 50)` is equal to ______.
What does the term ‘percent’ mean?
