Find the ratio of the following:(d) 30 minutes to 45 minutes

Find the ratio of the following: (a) 30 minutes to 1.5 hours

Find the ratio of the following: (d) 500 mL to 2 litres

Find the value of the following log_(tan45^@)cot30^@

The length of the minute hand of a clock is 14 cm. Find tdhe area swept by the minute hand in 5 minutes.

An electric kettle has two elements. One brings it to boil in 10 minutes and the other in 15 minutes. If the elements are in parallel, it will boil in

Find the ratio of : 30days to 36 hours

The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 10 minutes.

A spherical balloon is filled with 4500 pi cubic metres of helium gas. If a leak in the balloon causes the gas to escape at the rate of 72pi cubic metres per minute, then the rate (in metres per minute) at which the radius of the balloon decreases 49 minutes after the leakage begins is :

The speed of a boat in still water is 11 km/hr. It can go 12 km upstream and return downstream to the original point in 2 hours 45 minutes. Find the speed of the stream.