alleryA 180 m ટ્રેન 420 m ટનલમાં 20 m/s પર પ્રવેશે છે. તેને સંપૂર્ણપણે સાફ કરવાનો સમય?
A24 s
B30 s
C21 s
D36 s
Answer & Solution
Correct answer: B. 30 s
ટનલ સાફ કરવા માટે ટ્રેને 180 + 420 = 600 મીટર મુસાફરી કરવી જોઈએ, જેમાં 600 ÷ 20 = 30 સેકન્ડનો સમય લાગે છે.
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