What is the reflex angle between the hands of a clock at 8:30?
Angle traced by hour hand 17/2 hours = (360/12× 17/2)^⁰ = 255⁰ Angle traced by minute hand in 30 minutes = (360/60× 30)^⁰ = 180⁰ ∴ Reflex angle = 360⁰ - (255⁰ - 180⁰) = 360⁰ - 75⁰ = 285⁰ Alternate shortcut method: The angle between the two hands of a clock of 30 minutes past 8 O’clock θ=11/2 m-30h =11/2×30-30×8 = 165-240= 75° (Here, -ve sign does not matter) So reflex angle = 360 – 75 = 285°
Train P starts from Lucknow to Dehradun at 11:55 am with an average speed of 16.5 m/s. Train Q starts from Dehradunto Lucknowat 1:35 pm with an average ...
Two trains X and Y start at the same time in the opposite direction from two points P and Q and arrive at their destinations 25 and 16 hours respectivel...
Vicky and Vikram start running simultaneously around a rectangular track of length 750m from the same point at speeds of 40 km/hr and 35 km/hr. When wil...
A train covers a certain distance at a speed of 24 km/h and the next same distance with a speed of 30 km/h and the next same distance with a speed of 40...
The diameter of a wheel W is 63 cm. It completes 1000 rotations in 1 minute. Find the speed of the vehicle.
Two trains X and Y start at the same time in the opposite direction from two points P and Q and arrive at their destinations 25 and 16 hours respectivel...
A is cycling at an average speed of 10 km/hr such that he can reach a certain point at 12 noon. If he cycles at 15 km/hr, then he will reach the destina...
A train is travelling at the rate of 36 km/hr. How many seconds it will take to cover a distance of 4/5 km?
The aeroplane flies along a Square field @ 100, 200, 300 and 400 km/hours respectively. Then find the Average speed of the aeroplane during the whole jo...
A driver of truck sees an ambulance 160 meters ahead of him. After 20 seconds the ambulance is 140 meters behind. If the speed of the truck is 80 kmp/h,...