1.

यदि टंकी का `(3)/(5)` भाग 1 मिनट में भर जाता है , तो बचा हुआ भाग कितने समय में भर जायगा ?A. 40 secB. 30 secC. 36 secD. 24 sec

Answer» Correct Answer - a
(a) let total capacity of cistern is 5 units (ह‌‌‌ि‌न्‍‌दी)
Filled part of the cistern (ह‌‌‌ि‌न्‍‌दी)=5 unit`xx(3)/(5)=3` units
Rest part of the cistern (ह‌‌‌ि‌न्‍‌दी)=5-3=2 units
3 unt filled in =60 Sec.
1 unit filled in `=(60)/(3)`
2 units filled in `=(60)/(3)xx2=40` sec.


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