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Start learning 50% faster. Sign in nowLet the length of train be x m. According to the question, => 72 x (5/18) = x/14 => x = 280 m Length of the platform = 280 x (11/7) = 440 m Required time = (280 + 440)/20 = 36 seconds
Which of the following is a physical change?
Bronze is an alloy of-
The most reactive among the halogens is-
Urea is a —
The element used in the manufacture of safety matches is —
The chemical name of'Common salt’
The noble gas used in radiotherapy is
Milk tastes sour when kept in the open for sometimes due to the formation of-
The acid used in lead storage cells is-
The nucleus of an atom consists of-