The distance between two cars is 456 km. If the two cars approach each other at the speed of 42 km. per hour and 34 km. per hour respectively, find after what time they will meet.

Find the ratio of the following. Speed of a cycle 15 km per hour to the speed of scooter 30 km per hour.

From Borjhar Air Port of Guwahati two aeroplanes took off simultaneously, one towards the east with the speed of 720 km. per hour and the other towards the west with the speed of 880 km. per hour. After how many hours will the two aeroplanes be 4000 km. apart? Solve the problem by forming an equation.

A car and a bus start from a place P at the same time and move non-stop towards a place where the distance between P and Q is 210 km. The car takes half an hour less than the bus to arrive Q. If the average speed of the car is 10 km/h more than that of the bus, find the average speed of the car and the bus.

Two aeroplane A and B are approaching each other and their velocities are 108 km/hr and 144 km/hr respectively.The frequency of a note emitted by Aas heard by the passenger in B is 1170 Hz.Calculate the frequency of the note heard by the passenger in A.[velocity of sound 350 m(s)^-1 ].

Two poles of equal heights are standing opposite to each other on either side of the road which is 80m wide. From a point between them on the road the angles of elevation of the top of the poles are 60° and 30° respectively. Find the height of the poles .

Onna two-lane road, car A is travelling with a speed of 36 km h_1. Two care B and C approach car A in opposite directions with a speed of 54'km h_1 each. vAt a certain instant, when the distance AB is equal to AC, both being 1 km,* B’ decides to overtake A before C does. What minimum acceleration of car B is required to avoid an accident?

A plane is in level flight at constant speed and each of its two wings has an area of 25 m^2 . If the speed of the air is 180 km/h over the lower wing and 234 km/h over the upper wing surface, determine the plane’s mass. (Take air density to be 1 kg m^-3) .

A car covers first half of the distance between two places at a speed of 40 km/hr and the second half at 60 km/hr. What is the average speed of the car?

The wheels of a car move 5 times in a second.If the diameter of a wheel is 84 cm.Find the speed of the car in km/hr.

Work Problem related to speed, distance and time A men walks a certain distance at a certain rate. Had he walked 1/2 km per hour faster, he would taken one hour less. But if he had gone one km/hour slower, he would have taken three hours longer. Find the distance covered by the mann and his original rate of walking.