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Let length of train A = x Length of platform = 2x Speed = distance/time ⇒ 126 x 5/18 = (x + 2x)/15 ⇒ x = 175 m = length of train A Length of platform = 175 x 2 = 350m For train B, Speed = distance/time ⇒ (350 + 400)/36 x (18/5) ⇒ 75 km/hr
A store offers two consecutive discounts of 12% and 8% on an item. Determine the equivalent single discount percentage.
A student multiplied a number by 8/5 instead of 5/8. What is the percentage error in the calculation?
Monthly savings of ‘A’ is Rs. 600 more than his monthly expenditure and his total monthly income is Rs. 5000. If his monthly income is increased by ...
Find the successive discounts of 10%,20% and 40%.
1100 boys and 700 girls are examined in a test; 42% of the boys and 30% of the girls pass. The percentage of the total who failed is :
There are 100 students in a particular class. 60% students play cricket, 25 % play football and 15% play both the games. What is the number of students ...
'J', 'K', and 'L' appeared in an exam. 'J' scored 50% marks in an exam which was 70 more than passing marks. Whereas 'K' scored 40% marks in the exam wh...
The salary of a man decreased from Rs. 20000 per month to Rs. 15000 per month. . Find the decrease percent.
Ajay secured 30% in an exam but fell short of the passing mark by 60 marks, whereas Bijay scored 55% and exceeded the passing mark by 90 marks. Determin...
