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Start learning 50% faster. Sign in nowLet required distance be D km. Distance covered by Dev till 12:00 PM = 42 × 2 = 84 Time taken by them to meet each other = (D − 84)/(42 + 28) = 2.5 So, required distance = D = 2.5 × 70 + 84 = 259 km
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-