Question
Train P travelling at 52 km/hr crosses another train Q,
having three fourth of its length and travelling in opposite direction at 20 km/hr in 21 seconds. Train P passed a railway platform in 36 seconds. Find the length of platform.Solution
Let the length of the first train is x metre Length of second train = 3x/4 Therefore, (52 + 20) x 5/18 = {x + (3x/4)}/21 ⇒ 72 x 5/18 = (7x/4)/21 ⇒ x = 240 m Therefore, let the length of the platform be y metre ⇒ 52 x 5/18 = (240 + y)/36 ⇒ 520 = 240 + y ⇒ y = 520 – 240 = 280 m
Evaluate 3.2 × 2.5 + 1.5 × 1.2 and express the answer as a fraction.
Simplify: 2.4 ÷ 0.3 + 3/4
Ravi has read 4/5 of a book while Saumya has read only 5/8 of the book she is reading. Both, however, have another 150 pages of their respective books r...
Evaluate: (3/4) of 2.4 + (1.5 ÷ 0.5) − 0.8
Simplify:
0.36 ÷ 0.06 − 1.25 × (4/5) + 7/8
12.5% of 96 =?
The value of
2.666 …+ 2.77… in fraction form is:
Express 7/16 as a decimal correct to three decimal places.
Find the value for the given expression
