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By travelling at 10km/h higher than the original speed, train is able to make up 18 minutes while travelling 60 km. This condition is only satisfied at an initial speed of 40(and a new speed of 50 km/h). Alternate method: We go by option: 60/40 - 60/(40+10) = 3/2 - 6/5 = 3/10 3/10 x 60 = 18 minutes
A boy is supposed to distribute Rs.2400 among his three friends P, Q and R in the ratio of 4:3:5 respectively, but mistakenly he distributed in the rati...
The volume of a hemisphere is 2425 (1/ 2) cm3 . Find its radius (Take p = 22/7)
The ratio of length to breadth of a rectangle is 5:6. If the sum of the length and breadth of the rectangle is 44 cm, then find the area (cm2...
The area of a rectangle is 1/2 that of a square. The length of the rectangle is 20 cm and the breadth of the rectangle is 3/2 times that of the side of ...
A solid metallic cone with a radius of 6 cm and height of 12 cm is melted and recast into smaller cones with a radius of 3 cm and a height of 4 cm. How ...
Find the number of common tangents, if r1 + r2 = C1C2 .(With usual notations, r1 & r2 and C1 & C2 are the radii and centres of the two circles.)
The lateral surface area of a cube is 256 cm2 . The length of a cuboid is 50% more than the side of the cube. The breadth of the cuboid is 5 ...
Find the area (in cm2) of the scalene triangle whose sides are 5 cm, 9 cm and 8 cm.
Ramesh walked 6 km to reach the station from his house, then he boarded a train whose average speed was 60 km/h and thus he reached his destination. In ...