यदि टंकी का `(3)/(5)` भाग 1 मिनट में भर जाता है , तो बचा हुआ भाग कितने समय में भर जायगा ?

Options

A. 40 sec
B. 30 sec
C. 36 sec
D. 24 sec

Answer

a

Explanation

(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.