693 cm2 . In 30 minutes the hand will cover half a circle with a radius of 21 cm. Thus 0.5 * pi * 21^2 = 693 cm2
Water in a canal 30 dm wide and 12 dm deep is flowing with velocity of 10 km/hr. How much area will it irrigate in 30 minutes, if 8 cm of standing water is required for irrigation?
Length of minute hand of a clock is 14cm and hour hand is 10cm, find the difference of distance covered by the tip these two in 15 min?
An accurate clock shows 7 o'clock in the morning. Through how may degrees will the hour hand rotate when the clock shows 2:30 in the afternoon?
A clock is so placed that at 12 noon its minute hand points towards North-East. In which direction does its hour hand point at 1.30 p.m.?
