27*39 First multiply 7*9=63 write '3' and take 6 as carry. Then cross multiplication i.e. multiply '7*3'=21 and '9*2'=18 add '21+18+6(carry from first multiplication)' = 45....
Three small snails are each at a vertex of an equilateral triangle of side 60 cm. The first sets out towards the second, the second towards the third and the third towards the first, with a uniform speed...
A capacitor of unknown capacitance is connected across a battery of V volts. The charge stored in it is 360 pC. When potential across the capacitor is reduced by 120 V the charge stored in it becomes 120...