Start learning 50% faster. Sign in now
The speed of a car is 40% less than the speed of a bike.
Let’s assume the speed of a bike is ‘15y’.
speed of a car = 15y of (100-40)%
= 15y of 60%
= 9y
The sum of the speed of the bus and car is equal to the speed of the bike.
speed of the bus = 15y-9y = 6y
The time taken by a bus to cover (d-100) km distance in 9 hours.
(d-100)/6y = 9
(d-100) = 54y
d = (54y+100) Eq.(i)
If the time taken by car to cover (d+80) km distance is 2 hours more than the time taken by bike to cover (d+260) km distance.
(d+80)/9y = 2+ (d+260)/15y
Put the value of ‘d’ from Eq.(i) in the above equation.
(54y+100+80)/9y = 2+ (54y+100+260)/15y
(54y+180)/9y = 2+ (54y+360)/15y
(54y+180)/9y - (54y+360)/15y = 2
After solving the above equation, 0.4y+20 = 24
0.4y = 24-20
0.4y = 4
y = 10
Put the value of ‘y’ in Eq.(i).
d = (54x10+100) = 540+100 = 640
(i) The value of ‘d’ is the multiple of 16.
The above given statement is true.
(ii) The speed of the bike is 180 km/h.
Speed of bike = 15y = 15x10 = 150 km/h
The above given statement is not true.
(iii) The time taken by the car to cover (d+80) km is 8 hours.
time taken by the car to cover (d+80) km = (d+80)/9y
= (640+80)/(9x10)
= 720/90
= 8
The above given statement is true.
A cylindrical tank has a radius of 7 meters and a height of 24 meters. A cone is placed inside the tank such that it touches the bottom and the sides of...
A cylindrical tank has a radius of 7 meters and a height of 10 meters. How many liters of water can it hold? (1 cubic meter = 1,000 liters)
The perimeter of a rectangular field is 44 metres and its area is 61.5 m2 . What is the length of the diagonal of this field?
The angle of elevation of the top of a tower from a point on ground which is 30 mtrs. away from the foot of the tower is 30°. Height of the tower is:
In a rectangular floor of length and breadth of 21 metres and 6 metres, respectively, square tiles each of 2 metre edge length are to be laid. If the co...
Steel is used to make a hemispherical bowl that is 0.4 cm thick. The bowl's inner radius is 7 cm. Find the bowl's outside curved surface.
If the length of certain rectangle is decreased by 4 cm and breadth is increased by 2 cm, it would result in a square of the same area. What is the peri...
If the side of square and its area is in the ratio of 1:9 then find its perimeter?
The circumference of a circle is 33 cm and the length of the rectangle is 8 times the radius of the circle. Find the area (in cm2) of the rec...
A solid cube of side 8 cm is dropped into a rectangular container of length 16 cm, breadth 8 cm and height 15 cm which is partly filled with water. If t...