Question
A train travelling with a speed of 36 km/h can cross a
pole in 9 seconds. Find the time taken by the train to cross a 180 metres long platform if the speed of train is increased by 20%.Solution
Speed of train = 36 × 5/18 = 10 m/s Length of train = 10 × 9 = 90 metres Desired time = (180 + 90)/(1.20 × 10) = 22.5 seconds
If in a right angle triangle ABC, Angle B is a right angle. AB = 20 cm, BC= 21 cm if BD is perpendicular to AC find the length of BD?Â
Find the area of triangle having sides 7 m, 24 m, and 25 m.
If O is the orthocentre of ΔABC , if ∠BOC = 1000 then what is the measure of ∠BAC?
In ΔABC, PQ is parallel to BC If AP: PB= 3:5 and AQ= 3 cm, AC is equal to?
In ∆ABC , G is the centroid , AB = 12 cm, BC= 16 cm and AC = 20 cm , find GD, where D is the mid-point of BC?
In ∆ABC, AB = 5cm, BC = 10cm, and AC = 13cm then find out the value of cos A.
- Length of a chord in a circle of radius 'r' cm, is 18 cm and distance between chord and centre of the circle is 40 cm. Find the value of (3r + 7).
If O is circumcentre of acute angled triangle ABC, if ∠ OBC = 150 then ∠BAC = ?
In ∆ABC, AB = 5cm, BC = 6cm and AC = 10cm then find out the value of cos A?
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