"1.4 મીટર વ્યાસ અને 2.1 મીટરની ઉંચાઇની નળાકાર પાણીની ટાંકી પાઇપ દ્વારા ખવડાવવામાં આવી રહી છે.

Calculate the volume of a sphere of radius (3.0pm0.1) cm, if the error quoted is the standard deviation in the measurement. [Hint: V=(4pi)/(3)r^(3),((deltaV)/(V))^(2)=3^(2)xx((deltar)/(r))^(2) ]

Consider the following financial transactions : 1. Purchase of banker cheques for Rs 50,000 and above in one day 2. Cash payment of more than Rs 25,000 for foreign travel at one time 3. Securities transaction of more than Rs 1,00,000 4. Cash deposit of more than Rs 50,000 in any bank account in one day During which of these transactions is it compulsory to quote Income Tax PAN (Permanent Account Number)?